My Diary – Leonardo Cardillo

Key Takeaways

A plan and a model can share similar names, and that is where confusion starts.
ChatGPT Pro is a paid plan; GPT-5.2 Pro is a specific model that plan highlights.
To know what is being used at any moment, the product’s model label matters more than the rumor.

Story & Details

A name that sounds simple, then splits in two

By mid December 2025, people were asking a very direct question: “Have you heard of ChatGPT 5.2 Pro?” The phrase sounds like one neat product. In practice, it points to two different things.

One is ChatGPT Pro, a subscription plan priced at two hundred dollars per month. It was introduced as a way to scale access to OpenAI’s best models and tools, including higher-compute modes meant for harder problems. OpenAI described it as a top-tier plan designed for users who want the strongest capabilities and the most room to use them.

The other is GPT-5.2 Pro, a model—a specific engine that produces answers. In the OpenAI platform documentation, GPT-5.2 Pro is presented as a model built for tough problems and designed to support advanced, multi-turn work in the Responses API. In the consumer product’s plan page, it appears as “Pro reasoning with GPT-5.2 Pro,” tying the model name to the Pro plan.

Where “Thinking” fits in

GPT-5.2 is also described in multiple variants, including GPT-5.2 Thinking. In OpenAI’s own write-up, GPT-5.2 Thinking is positioned as a very strong vision-capable model, aimed at understanding things like charts and software interfaces. On the ChatGPT plan page, GPT-5.2 Thinking shows up as the advanced reasoning option available in Plus and above.

That makes a practical difference for the everyday question: “Right now, what am I using?” In ChatGPT, the cleanest answer is not a guess about a plan. It is the label shown in the model selector. If the selector says GPT-5.2 Thinking, that is the model in use. If it says GPT-5.2 Pro, that is the model in use.

A short Dutch mini-lesson for real life in the Netherlands (Europe)

Living around Dutch words can feel like learning by osmosis. A few small phrases help fast.

Phrase: Ik begrijp het.
Word-by-word: Ik = I; begrijp = understand; het = it.
Use: Neutral and common. Good for everyday talk.

Phrase: Kunt u dat herhalen?
Word-by-word: Kunt = can; u = you (polite); dat = that; herhalen = repeat.
Use: Polite and normal in shops, offices, and formal moments.

Phrase: Mag ik pinnen?
Word-by-word: Mag = may; ik = I; pinnen = pay by card.
Use: Very common in stores. Short, direct, and friendly.

Conclusions

In December 2025, the strongest way to stay calm in the naming noise is to separate the layers. ChatGPT Pro is a plan. GPT-5.2 Pro is a model. GPT-5.2 Thinking is another model, often offered as advanced reasoning. When someone asks what is being used right now, the answer lives in the model label the product shows—clear, simple, and more reliable than the catchy nickname.

Selected References

[1] https://openai.com/index/introducing-gpt-5-2/
[2] https://chatgpt.com/pricing/
[3] https://help.openai.com/en/articles/9793128-what-is-chatgpt-pro
[4] https://openai.com/index/introducing-chatgpt-pro/
[5] https://platform.openai.com/docs/models/gpt-5.2-pro
[6] https://www.reuters.com/technology/openai-launches-gpt-52-ai-model-with-improved-capabilities-2025-12-11/
[7] https://www.youtube.com/watch?v=hNr5EebepYs

Appendix

ChatGPT

A consumer AI chat product by OpenAI, where users choose plans and often pick a model from a menu.

ChatGPT Pro

A top-tier ChatGPT subscription plan priced at two hundred dollars per month, designed to provide scaled access to OpenAI’s best models and tools.

GPT-5.2

A generation of OpenAI models released in December 2025, with named variants that focus on different strengths.

GPT-5.2 Pro

A GPT-5.2 variant positioned for harder problems and highlighted in ChatGPT’s Pro tier and in OpenAI’s developer model documentation.

GPT-5.2 Thinking

A GPT-5.2 variant positioned as a strong reasoning-and-vision model, described as especially good at understanding charts and software interfaces.

Model

The specific AI engine that produces outputs; plans can include many models, but only the selected model is “in use” for a given response.

Responses API

An OpenAI developer API designed for multi-turn interactions and advanced workflows, where certain models are offered for structured, tool-ready use.

Key Takeaways

• ChatGPT can be shaped through Personalization and Custom Instructions, so replies feel steadier and less annoying.
• A short style line can block slash-style gender wording and keep one consistent generic form.
• A small Dutch mini-lesson helps recognize common menu terms while adjusting these settings.

Story & Details

ChatGPT is often judged by the small things. The tone. The rhythm. The little habits that repeat. On December eighteen, two thousand twenty-five, the focus is not on bigger models or new features, but on something quieter: making the same tool feel more natural every time it speaks.

The name of the setting is Custom Instructions. It sits inside Personalization. It is simple in idea: a place to store preferences so they do not need to be repeated. For people who care about clean language, this box becomes a kind of filter. It can keep replies direct. It can keep them calm. And it can stop a specific style that feels clunky on the page: slash-style gender variants.

A clean style preference that stays out of the way

A short preference can make a strong difference: avoid slash-style gender wording and keep one consistent generic form. When a sentence would sound forced, rewrite it instead of squeezing in awkward shapes. The result is smoother text that reads like it was written by one person, not stitched together.

A tiny Dutch mini-lesson for the menu words

Instellingen — settings
Word-by-word: instellingen — settings
Tone and use: neutral, everyday, common in apps

Personalisatie — personalization
Word-by-word: personalisatie — personalization
Tone and use: neutral, used for profile and behavior settings

Aangepaste instructies — custom instructions
Word-by-word: aangepaste — customized; instructies — instructions
Tone and use: practical, used for stored preferences

Plak het hier — paste it here
Word-by-word: plak — paste; het — it; hier — here
Tone and use: direct and friendly, common in forms

Why it feels bigger than it looks

A single box changes the feel of everything that comes after it. When the preference is clear, the replies stop drifting. The same voice returns, again and again, without extra effort.

Conclusions

Personalization is not loud, but it is powerful. The smallest preferences can turn a helpful tool into one that feels comfortable, consistent, and easier to trust for daily writing.

Selected References

[1] https://help.openai.com/en/articles/8096356-chatgpt-custom-instructions
[2] https://openai.com/index/custom-instructions-for-chatgpt/
[3] https://openai.com/index/memory-and-new-controls-for-chatgpt/
[4] https://www.youtube.com/watch?v=CmP3XXwKJ60

Appendix

ChatGPT: A conversational AI product that can answer questions and help with writing, planning, and learning.

Custom Instructions: A settings feature that stores preferences about tone, format, and wording, so replies follow the same style across chats.

Dutch: The main language used in the Netherlands (Europe), often seen in short menu words inside apps and phones.

Masculine Generic: A language preference where one generic form is chosen as the default for general references.

Personalization: A settings area where behavior and style can be adjusted so replies match a preferred voice.

Slash Forms: A writing style that combines alternatives with a slash; some readers prefer to avoid it for cleaner, more natural text.

Key Takeaways

A fast-moving Facebook Reel turned a real archaeological feature into a neat mystery story, centered on a stone circle at Cempoala in Veracruz, Mexico (North America).

The site does include rings of stepped stone, but reputable descriptions focus on their practical role in tracking time, harvest cycles, and eclipses—not on modern “millimeter-perfect” machining claims.

A few basic, checkable facts—who manages the site, what the rings are described as, and when the site was first documented—help separate wonder from invention.

Story & Details

In December two thousand twenty-five, a short Facebook Reel spread widely with a dramatic headline rendered in English as “The Enigma of the Stone Circle,” naming Cempoala in Veracruz, Mexico (North America). The visuals showed a dry, open landscape from above, with a large circular stone form in the foreground and another ringed feature behind it, near low platforms and a stepped structure. The post carried an account name styled as Asombro.Club and sat in the familiar Reels interface, complete with a follow button, a visible “AI information” label, and engagement numbers that signaled momentum: about one and a half million plays, roughly forty-two thousand reactions, tens of thousands of likes, hundreds of comments, and thousands of shares.

The narration-style text attached to the claim was built to hook attention. It asked readers to imagine a stone circle “so perfectly carved and polished” that centuries of time had still failed to wear it down. It added that the place had been “explored since nineteen ten,” and it described the material as volcanic rock with soft edges and “millimeter symmetry.” The framing leaned hard into the idea of an object that seems too precise to belong to an ancient landscape, and it used the word “enigma” as a promise.

Cempoala itself does not need exaggeration. Official descriptions by Mexico’s National Institute of Anthropology and History describe it as an important Totonac center, with major buildings, plazas, and a history tied to the shifting powers of the region, including the Mexica and the Spanish arrival in the early sixteenth century. Within that official picture, the rings are not presented as an unexplained anomaly. They are described as three rings of stepped stone found in one of the plazas, used by priests as a way to measure time, harvests, and eclipses. That is still remarkable—just in a different way: it points to observation, ritual authority, and community planning, not a single “perfect object” divorced from everything around it.

The “explored since nineteen ten” line also sits awkwardly beside the institutional timeline. A separate official description connected to the site museum notes that the archaeological zone was discovered in eighteen ninety during expeditions led by Francisco del Paso y Troncoso, and it outlines later phases of excavation and work, including important efforts in the nineteen forties and the development and reopening of a small on-site museum in the late twentieth and early twenty-first centuries. In other words, the real story is longer, more layered, and better documented than the Reel suggests.

None of this removes the pleasure of the first glance. A ring of stone in a wide field can feel cinematic, especially in an aerial shot. But the strongest version of the Cempoala story is not that the stones resisted time because they were impossibly polished. It is that people built forms whose meaning depended on time—seasons, crops, sky events—and placed those forms in civic space, where knowledge could be practiced and displayed.

Conclusions

The Reel’s mystery tone travels well, but Cempoala in Veracruz, Mexico (North America) stands on a sturdier foundation: documented history, named features, and clear descriptions from responsible stewards.

The rings remain a striking sight. They simply belong to a human scale of purpose—counting, marking, organizing life—rather than to a claim of flawless machining.

Wonder grows when the details are true, and Cempoala offers plenty of true detail.

Selected References

[1] National Institute of Anthropology and History (Mexico): Cempoala archaeological site description (English) — https://lugares.inah.gob.mx/en/node/4379
[2] National Institute of Anthropology and History (Mexico): Cempoala site museum description and discovery timeline (English) — https://lugares.inah.gob.mx/en/node/4318
[3] Atlas Obscura: Overview entry for the Cempoala archaeological zone — https://www.atlasobscura.com/places/zona-arqueologica-cempoala
[4] INAH TV (institutional channel): Cempoala talk video on YouTube — https://www.youtube.com/watch?v=6qHyoggkcsQ

Appendix

Archaeological Site A protected place where traces of past human life—buildings, objects, and landscapes—are studied and cared for.

Eclipse A sky event when one celestial body blocks another from view, such as the Moon passing in front of the Sun.

Institute An organized public body that manages work in a field; here it refers to the National Institute of Anthropology and History, a government cultural institution in Mexico (North America).

Mexica A powerful people and state centered on Tenochtitlan, often linked to the Aztec Empire in later writing.

Plaza An open public space used for gatherings, ceremonies, and daily civic life.

Reel A short, vertical video format used on social platforms, designed for fast sharing and quick viewing.

Stepped Stone Rings Circular structures built in levels, described at Cempoala as tools used by priests to track time, harvest cycles, and eclipses.

Totonac A cultural group in the Gulf region of Mexico (North America), linked with major settlements such as Cempoala.

Key Takeaways

• The Alchemist is a short novel by Paulo Coelho, first published in nineteen eighty-eight, about a shepherd named Santiago and a dream of treasure.
• The book reads like a modern fable, with simple scenes and big ideas about purpose, courage, and paying attention.
• Many people remember the ending as “the treasure was under his bed,” but the story does not end that way in a literal sense.
• An audiobook version was recommended on YouTube, and a single reminder line was kept in a neat, numbered style.
• A tiny Dutch mini-lesson can help turn a quick note into a clear message.

Story & Details

The piece is about The Alchemist, a slim, famous novel that often travels by word of mouth as much as it travels by page. It follows Santiago, a young Andalusian shepherd from Spain (Europe) who keeps having a dream about treasure. That dream becomes a push. It pulls him away from the safe routine of sheep and fields and into a long journey across North Africa toward Egypt (Africa).

The tone is calm and clear, like a fable told by a friend. The scenes are easy to picture. The ideas are bigger than the plot: a personal calling, the fear that stops people, and the small signs that feel meaningful when someone is brave enough to look. The book also divides readers. Some feel lifted by it, especially in moments of change. Others find it too tidy, too repeated, or too close to advice.

In December two thousand twenty-five, the same plot question still shows up in casual retellings: is it true that the dream sends the hero searching, only for the treasure to end up under his bed? The dream part is true. The under-the-bed part is the common mistake. The ending plays with the idea that what is most valuable can be closer than expected, but it does not land on a simple, literal “it was under the bed” twist.

There was also a practical detail that fits the book’s mood: a clean little system for staying on track. The rule was simple—keep the original order, delete what is no longer needed, and renumber in jumps of ten. One note was marked as pending on WhatsApp. One reminder line was kept exactly in that style: “10. Listen to the audiobook of The Alchemist on YouTube.”

A Tiny Dutch Note

Dutch can turn a quick status into a clear, polite line.

“In afwachting op WhatsApp.”

A very simple word map:

• In = in
• afwachting = waiting
• op = on
• WhatsApp = WhatsApp

This sounds neutral and practical. It fits a short message, a task note, or a calm follow-up.

Conclusions

The Alchemist stays popular because it is easy to follow and easy to feel. A dream starts the motion, a road tests the traveler, and the final point is less about a trick ending and more about what the journey teaches a person to see.

Selected References

[1] https://www.britannica.com/topic/The-Alchemist-novel-by-Coelho
[2] https://www.britannica.com/biography/Paulo-Coelho
[3] https://www.harpercollins.com/products/the-alchemist-paulo-coelho
[4] https://www.paulocoelho.com/product/?isbn=9780062315007
[5] https://www.youtube.com/watch?v=1l6JHMBVYhM

Appendix

Alchemy: A traditional idea of turning ordinary material into something more precious, often used in stories as a symbol for inner change.

Audiobook: A spoken recording of a book that can be listened to instead of read.

Andalusian: From Andalusia, a region in southern Spain (Europe), used here to describe Santiago’s home.

Egypt: A country in Africa, named as the goal of Santiago’s journey in the story.

Fable: A short, simple story that carries a lesson through clear events and characters.

North Africa: A region in Africa, named as the broad setting of Santiago’s travels.

Omens: Small signs that a person reads as meaningful, especially when making hard choices.

Personal Legend: The book’s term for a person’s life goal or true calling.

Santiago: The shepherd who is the main character of The Alchemist.

Treasure: The thing Santiago thinks he is searching for, and also a symbol for what the journey changes in him.

WhatsApp: A messaging app, used here as a place where a note was marked as still pending.

YouTube: A video platform where an audiobook version was recommended and where a single related video link is listed in the references.

Key Takeaways

The feeling

• A day began with a blunt line: life felt unbearable, and the mood was raw.

The method

• A simple A-or-B script narrowed chaos into one choice at a time, with no extra options.

The turning points

• Food came first, then one tiny act of order, then a planned sleep cycle with alarms, then a clean restart.

The open loop

• The last blocker was practical: leaving home felt heavy because the needed items were unclear.

Story & Details

What this is about

This piece is about a small method called the A/B check-in: two choices only, repeated until the next move becomes clear. In December 2025, it was used in the middle of a day that felt like pure overload.

When everything is noise

The day opened with a hard truth in plain words: the limit had been reached. The world felt like chaos. Not a puzzle to solve. Not a mood to “work through.” Just chaos.

So the frame stayed tight. Two choices, then stop. Outside pressure or inside pressure. The answer landed on outside pressure: unfinished tasks. Then another fork: work life or home life. Home life carried more weight. Not people drama. Practical tasks. Too many of them, each one small, but together like a wall.

The energy was low. Ten minutes felt out of reach. Two minutes also felt out of reach. The body asked for a stop, not a sprint. The mind wanted one clean sentence: the tasks were creating panic.

First relief: the body, not the calendar

Before any plan, hunger took the lead. Something simple was available. The goal was tiny on purpose: two bites, no screen, just enough to change the signal. After that, the pressure dropped a little. Not a miracle. A small shift that mattered.

Then the method returned to its heart: one easy thing, not five. One box, in its place, within a few steps. Thirty seconds. Done. The chaos eased again, just a little, but in the right direction.

Sleep as a tool, not a defeat

The next conflict was sharp: sleep was needed, but sleep also felt risky. The fear was simple: if the body relaxed, it would fall asleep, and if it fell asleep, nothing would get done.

The choice became a sleep choice, not a surrender. A full sleep cycle was selected: about ninety minutes. Two alarms were set, with a backup alarm placed far away to force movement. Water was taken before lying down. One rule was held tightly: no decisions on waking, only feet on the floor.

When waking came, clarity was better. Water followed. Then the smallest kind of order returned: three quick moves, then stop. A shower came next, not rushed. After that, the body felt more awake.

Work life returns, but the task is physical

The next pressure point was work or study. It was not a computer task. It was physical. It required leaving home.

The hardest part was not the thing outside. It was getting ready. Even gathering basics felt blocked. The final snag was not laziness, not fear of people, not a missing device. It was simpler than that: uncertainty about what to bring.

Mini Dutch lesson

In the Netherlands (Europe), short everyday Dutch can carry big feelings in few words. One useful phrase for a breaking point is: “Ik ben er klaar mee.” It is common and direct, often said when patience is gone.

A very simple sense is: a person is done with it. Word by word: “Ik” means “I.” “ben” means “am.” “er” is a small pointer like “there” that often appears in fixed phrases. “klaar” is “ready.” “mee” is “with.” The tone can sound blunt, so it fits moments of real strain.

Conclusions

What changed the day

The day did not change through a big plan. It changed through a narrow doorway: hunger handled first, one object put away, then a sleep cycle treated like equipment, not failure.

Why the method held

Two choices at a time reduced the mental load. The body got what it needed, the mind stopped chasing a perfect plan, and a fresh wake-up became possible.

What remains true

Even after a cleaner restart, one real-life detail still mattered: leaving home is easier when the “exit kit” is obvious.

Selected References

Sleep and naps

[1] https://www.sleepfoundation.org/stages-of-sleep
[2] https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/napping/art-20048319
[3] https://www.thensf.org/the-benefits-of-napping/

Breathing and stress

[4] https://www.nhs.uk/mental-health/self-help/guides-tools-and-activities/breathing-exercises-for-stress/

Video

[5] https://www.youtube.com/watch?v=3cXGt2d1RyQ

Appendix

Alarm

An alarm is a timed signal used to mark a boundary, like the end of a nap or a reminder to move.

A/B check-in

An A/B check-in is a two-option prompt that reduces choices to one decision, made repeatedly until a next step appears.

Binary choice

A binary choice is a choice with only two options.

Decision fatigue

Decision fatigue is the feeling of mental wear that can grow after many choices, making later choices harder.

Exit kit

An exit kit is the small set of essentials needed to leave home, gathered in one place.

Feet on the floor

Feet on the floor is a simple wake-up action that starts movement before thinking starts.

Grogginess

Grogginess is a heavy, foggy feeling that can happen after waking, especially from deeper sleep.

Hunger cue

A hunger cue is the body’s signal that food is needed, often felt as low focus, irritability, or shakiness.

Nap

A nap is a short sleep taken in the day, sometimes planned to restore alertness.

Pending tasks

Pending tasks are unfinished duties that stay open and keep pressure on attention.

Sleep cycle

A sleep cycle is a repeating pattern of sleep stages that often averages around ninety minutes in adults.

Sleep inertia

Sleep inertia is the slow, confused feeling after waking that can be stronger when waking from deep sleep.

Electric shaver, T-blade trimmer, and comb in carry-on baggage

Key Takeaways

The simple answer

An electric shaver, a hair trimmer, and a comb are usually fine in carry-on baggage.

The two things that matter most

Lithium batteries and security screening decisions can change what happens at the airport.

The smart habit

Cover sharp parts, prevent switching on by accident, and keep spare batteries protected in the cabin.

Story & Details

What this is about, in plain words

In December 2025, a simple travel question comes up before a flight: can a small grooming set go in carry-on baggage? The set is clear and practical—an electric shaver, a T-blade style trimmer for edging, and a comb. The goal is also clear: keep these items close in the cabin, not in checked baggage.

What usually works at security

Across common airline and airport guidance, electric shavers and hair clippers are widely treated as allowed items in both cabin and checked bags, with the fine print living in batteries and safety handling. That is why the battery detail matters as much as the device itself. Lithium-powered devices generally belong in the cabin so a problem can be handled fast. If a spare battery is carried, it should be in the cabin too, with its contacts protected so it cannot short.

The small packing moves that prevent big hassle

The trimmer’s cutting head is the part that tends to worry people, not because it is a weapon, but because it looks sharp and can start by accident. A cap, guard, or case keeps the edge covered and keeps the switch from turning on in a bag. The same calm logic applies to batteries: keep them protected, separated, and treated as active power sources, not loose metal.

A quick way to recheck, fast

When rules feel unclear, exact search phrases can help confirm the latest guidance without scrolling for long. Phrases like “rechargeable electric shaver carry on,” “electric shaver carry on,” and “hair clippers carry on” keep the search focused on the right items.

One last reality check

Even when an item is commonly allowed, the final call can still rest with the screening point and the specific airport or airline on the day. That is why simple packing choices—covering blades, preventing activation, and handling batteries with care—do more than follow rules. They lower friction.

Conclusions

A calm ending for a common travel worry

A carry-on grooming kit can stay simple: shaver, trimmer, comb. Pack it neatly, treat batteries with respect, and make the sharp parts look as safe as they are. In a busy airport, that quiet preparation is often the difference between walking through and slowing down.

Selected References

[1] https://www.gov.uk/hand-luggage-restrictions/electronic-devices-and-electrical-items
[2] https://www.catsa-acsta.gc.ca/en/what-can-bring/item/electric-shavers
[3] https://www.catsa-acsta.gc.ca/en/what-can-bring/item/hair-clippers
[4] https://www.iata.org/en/youandiata/travelers/batteries/
[5] https://www.caa.co.uk/passengers-and-public/passenger-guidance/baggage/safety-advice-on-what-to-pack/
[6] https://transport.ec.europa.eu/transport-modes/air/aviation-security/information-air-travellers_en
[7] https://www.finnair.com/nl-en/frequently-asked-questions/baggage/can-i-carry-a-razor-in-my-carry-on-baggage–1887254
[8] https://www.youtube.com/watch?v=AQeJvdA16jM

Appendix

Accidental activation means a device turns on inside a bag without anyone touching it, often because a switch is pressed by other items.

Battery terminals are the metal contact points on a battery; covering or isolating them helps prevent a short circuit.

Cabin baggage is the bag kept with the passenger in the aircraft cabin, also called carry-on baggage.

Dutch mini-lesson: A useful airport line is “Mag dit in mijn handbagage?” Simple meaning: asking if an item may go in carry-on. Word-by-word: “Mag” = may, “dit” = this, “in” = in, “mijn” = my, “handbagage” = hand baggage. Tone: polite and normal. A slightly more careful variant is “Mag ik dit in mijn handbagage meenemen?” where “Mag ik” = may I, and “meenemen” = take along.

Electric shaver is a rechargeable or plug-in grooming device used for shaving; many rules treat it as a normal personal electronic item.

Hair clippers are an electric grooming tool for cutting hair; a T-blade trimmer is a common edging style within this family.

Lithium battery is the common rechargeable battery type inside many travel devices; airline safety guidance often prefers these in the cabin rather than checked bags.

Protective cap or guard is a cover over a blade or cutting head that reduces the chance of injury, damage, or unwanted attention at screening.

Spare battery is an extra battery carried separately from a device; safer packing keeps it protected and in the cabin, not loose in checked baggage.

T-blade trimmer is a hair trimmer with a T-shaped cutting head, often used for clean lines and edging.

Trip label is a short personal tag used to mark a journey by month and year, helping keep packing checks tied to a specific trip.

Key Takeaways

The core idea

WhatsApp can work perfectly in its own app, yet still fail to appear as a contact action inside Google Contacts, because the phone cannot link that number to WhatsApp’s contact integration.

Why it feels confusing

A chat can exist without a clean contact-card link. Messaging and contact-card buttons are not the same system.

One safe move

Clearing the WhatsApp cache on Android is usually harmless, because it removes temporary files, not chat history.

Story & Details

A small button that changes everything

This is about a very specific moment: opening a person’s entry in Google Contacts and expecting to see a WhatsApp option under the phone number, address, and other details. For some contacts, the WhatsApp action shows up automatically. For others, it never appears, even though WhatsApp messaging is already working and notifications prove the connection is real.

Two systems, one name, and a mismatch

On Android, the contact card is powered by the device’s contacts database and the permissions around it. WhatsApp, meanwhile, builds its own view of who is reachable based on what it can read and match from that database. When the match fails, WhatsApp can still let a chat exist by number, but the contact card may stay “blind” to WhatsApp.

The most common reasons are simple but stubborn. A number might be saved in a place WhatsApp is not reading, such as a different account source. A number might be stored in a format that looks fine to a human but does not match how WhatsApp expects to compare it. Permissions can be granted in a way that is incomplete or later paused. Duplicate contact records can split a single person into two “versions,” with WhatsApp attaching to one while the contact card opens the other. Official WhatsApp guidance points straight at contacts permission as a key requirement for names and linking to work as expected. [1] [2] Google’s Android permission guidance also describes how contacts access is controlled and can be changed per app. [3]

When “everything is correct” and it still fails

Sometimes the usual fixes do nothing. In those cases, the cause is often separation. A Work Profile can keep work data and personal data apart on the same phone, including contacts, which can make one side unable to see the other. Google describes Work Profile as a way to separate work apps and data from personal apps and data. [4] Android’s own enterprise documentation also discusses how contacts behave across a work profile. [5] The result can look strange: WhatsApp chats exist, yet the Google Contacts card does not offer WhatsApp, because the contact record and the WhatsApp install live in different worlds on the same device.

A second kind of separation is duplication. Some phones can run two WhatsApp instances or two user spaces. If the chat activity happens in one instance while the contact card is trying to link to the other, the WhatsApp action may not appear where it is expected.

Cache: the low-drama cleanup

Cache is temporary. It is meant to speed things up. Android’s official guidance explains cache as temporary data stored to help apps load faster, and notes that clearing it can help when outdated files cause issues. [6] That is why clearing WhatsApp’s cache on Android is usually safe: it targets temporary files rather than the core content. The risky action is clearing storage or app data, which can behave like a reset.

A tiny Dutch mini-lesson

The phone may be set to Dutch, or a Dutch-speaking helper may be involved. These short lines are common and practical.

A simple, natural meaning: telling someone that the cache will be cleared.
Dutch: Ik ga de cache wissen.
Word-by-word mapping with nuance: Ik means I. Ga means go, used here like am going to. De means the. Cache means cache. Wissen means erase or clear, neutral and everyday.
Register and use: neutral, normal speech.
Natural variants: Ik wis de cache. De cache wissen.

A simple, natural meaning: asking if WhatsApp may access contacts.
Dutch: Mag WhatsApp mijn contacten gebruiken?
Word-by-word mapping with nuance: Mag means may or is allowed to. WhatsApp is the app name. Mijn means my. Contacten means contacts. Gebruiken means use.
Register and use: polite, everyday.
Natural variants: Mag WhatsApp mijn contacten zien? Toestemming voor contacten.

Conclusions

The missing link, not the missing app

A WhatsApp chat can be alive while a Google Contacts card stays quiet. The gap is usually a linking problem: number formatting, account source, permission state, duplicates, or a split world like Work Profile. Once that idea is clear, the problem stops looking mysterious and starts looking like a clean mismatch between two systems that only cooperate when the details line up.

Selected References

[1] https://faq.whatsapp.com/1173713140597106
[2] https://faq.whatsapp.com/5472030609512325
[3] https://support.google.com/googleplay/answer/9431959?hl=en
[4] https://support.google.com/work/android/answer/6191949?hl=en
[5] https://developer.android.com/work/contacts
[6] https://www.android.com/articles/clear-cache-and-cookies/
[7] https://www.youtube.com/watch?v=bFp2n5OxYEE

Appendix

Android app cache: Temporary files stored by an app to help it load faster, which can be cleared without usually deleting the app’s main content.

Cache: A pool of short-term data that speeds up loading and reduces repeated downloading, but can sometimes become stale or cause odd behavior.

Contacts permission: A system setting that controls whether an app can read the phone’s address book, which affects matching names and showing contact-based actions.

Contacts storage: The Android system component that holds contact records and makes them available to apps that have permission.

Country code: The international dialing prefix that helps apps match phone numbers consistently across formats and regions.

Dual Apps: A device feature that lets the same app run twice as separate instances, which can confuse linking between a contact card and the correct app instance.

Google Contacts: A contacts app and service that displays contact cards and actions, drawing from the phone’s contact database and linked accounts.

iPhone: Apple’s smartphone platform, where contact integration and cache controls differ from Android and are often handled inside each app rather than through a single system cache button.

WhatsApp: A messaging app that can show contact actions in a contact card when the phone number is saved, readable, and correctly linked through permissions and matching.

Work Profile: An Android feature that separates work apps and data from personal apps and data on one device, which can also separate contacts and affect app linking.

Key Takeaways

The quick meaning

A Yahoo notice about “service provider” is usually about which company terms and privacy rules apply to an account, not a warning that the account is broken.

The calm signal

When a message says “You don’t need to do anything” and “We’ll never ask you for your password,” it reads like a policy notice, not a panic alarm.

The simple safety idea

Trust the account page you reach by typing the address yourself, not a link you did not expect.

Story & Details

What the notice is about

In December 2025, a short Yahoo notice has already reached many users with one main point: an account is linked to the right Yahoo company for where it is usually accessed. It names regions such as the United Kingdom (Europe), Europe, the Middle East, and Africa, and says that this determines which terms and privacy policy apply.

The company name that matters

The notice points to Yahoo International Limited in Ireland (Europe). In plain words, that means the legal “home” of the account is set to that Irish company, so its Terms of Service and Privacy Policy are the ones that govern the account. It also says the account, messages, and settings keep working as before.

The line that stands out

Two sentences do most of the work. One is “You don’t need to do anything.” The other is “We’ll never ask you for your password.” Together, they frame the note as a quiet administrative update, not a demand for urgent action.

A small Dutch phrase for this moment

Dutch has a short, natural line that fits the situation: “Klik niet op links.”
It is used as a clear warning in everyday speech and in security advice.
A very direct word-by-word guide helps it stick:
“Klik” is “click” as a command, “niet” is “not,” “op” is “on,” and “links” is “links.”
A close cousin that sounds just as natural is “Klik nergens op,” which uses “nergens” to mean “nowhere,” with the same firm, practical tone.

Why people hesitate

These notices can feel strange because they talk about law, privacy, and geography, all at once. But that is also why they exist: big services often set a user’s account under the right regional company so the right rules apply, especially across borders.

Conclusions

A message like this can be plain and real at the same time: quiet language, a clear company name, and no push for a password. In a year full of loud scams, the soft ones can feel surprising, but the best reading is often the simplest one.

Selected References

[1] https://guce.yahoo.com/privacy-policy?locale=en-GB
[2] https://guce.yahoo.com/terms?locale=en-GB
[3] https://legal.yahoo.com/ie/en/yahoo/terms/contract-summary/yahoo-mail/index.html
[4] https://business.gov.nl/running-your-business/security-and-fraud/phishing/
[5] https://consumer.ftc.gov/articles/how-recognize-avoid-phishing-scams
[6] https://www.youtube.com/watch?v=dYGYCrD7uog

Appendix

Account sign-in

An account sign-in is the act of entering credentials to access an online account, often tracked as recent activity so unusual access can be noticed.

Data controller

A data controller is the company that decides why and how personal data is used for a service.

Phishing

Phishing is a scam that tries to trick a person into giving away private details, often by pretending to be a trusted company.

Privacy policy

A privacy policy is a public document that explains what personal data a service collects, how it uses that data, and what choices a person has.

Service provider

A service provider is the company that supplies the service under specific legal terms, which can differ by region.

Terms of service

Terms of service are the rules and conditions that describe what a service offers and what users agree to when they use it.

Key Takeaways

The core idea

A simple A–B word-choice quiz was used as a fast way to guess personality style and thinking style.

The hard limit

Without validated questions, scoring keys, and norms, no scientific intelligence score can be produced from A–B picks alone.

What still showed up

Even in a loose test, persistence, error-spotting, and comfort with basic math and logic can show clear, human patterns.

Story & Details

The experiment in plain sight

On Tuesday, December 16, 2025, a small online experiment took shape: a binary quiz, built from repeated choices between option A and option B. The goal was bold and direct—use those choices to infer both personality and intelligence in a scientific way.

The rules were strict. Each prompt had to be binary. The next prompt could not appear until the current one had an answer. Later, the format tightened again: the run would be framed as a thirty-question set, labeled clearly as “one of thirty,” “two of thirty,” and so on, so progress never felt vague.

A pattern of answers

Across the sequence, the answers leaned heavily toward A, with occasional turns to B, and even a brief shift in letter casing. The overall feel was steady and repetitive on purpose—less like playful guessing, more like pushing a system until it either proves itself or breaks.

That insistence on structure mattered. When the numbering looked off—when a count appeared to jump toward “twenty-seven of thirty” too quickly—it triggered immediate pushback. The format was not a decoration; it was treated as the spine of the test.

Where “intelligence” entered, and where it resisted

A central demand remained constant: there had to be a way to determine intelligence from the choices, not only personality. That is where the method hit its biggest scientific wall.

Intelligence tests that claim real meaning rely on careful design: item selection, standardization, and norms that allow a person’s score to be compared to a reference group. Without that foundation, A–B picks cannot be converted into an Intelligence Quotient in any defensible way, even if the quiz is long.

Still, some moments did carry genuine signal about reasoning habits. One sharp example arrived as a correction about rates: the claim was made that twenty percentage points represent one fifth, followed by a quick mental calculation—seventy-five divided by five equals fifteen, and seventy-five minus fifteen equals sixty. That was not a personality “vibe.” It was applied arithmetic, written fast, and used to challenge an error.

Another moment hinted at informal logic: a fragment built from invented words suggested a syllogism-like move, where swapping a label changes which conclusion appears to follow. Even through messy spelling, the intent was clear—test whether structure, not vocabulary, drives meaning.

A brief Dutch mini-lesson

A few Dutch basics, kept short and usable:

“Dank je wel”
“Alsjeblieft”
“Goedemorgen”

What the behavior suggests, carefully

With the evidence available, only modest, behavior-level inferences are safe. The repeated demand for binary clarity, the focus on correct counting, and the willingness to challenge math phrasing point toward a structured, detail-focused approach. The sustained pace—continuing even after frustration—also fits persistence under uncertainty.

Personality frameworks like the five-factor model describe traits such as conscientiousness and openness, but mapping a run of A–B answers onto those traits requires a validated instrument. What can be said is simpler and more grounded: the session showed a preference for clear constraints, a low tolerance for sloppy scoring, and a readiness to test the tester.

Conclusions

What remains after the last choice

A binary A–B quiz can be engaging, and it can reveal style: patience, insistence on structure, and moments of quick correction. But intelligence—especially an Intelligence Quotient—does not come out of raw choices unless the entire system behind the choices is built like a real test.

What stood out most was not a score, but a stance: keep the format tight, keep the math honest, and do not let the method hide behind vague progress or fuzzy definitions.

Selected References

[1] https://www.britannica.com/science/intelligence-test
[2] https://www.britannica.com/science/psychological-testing/Test-norms
[3] https://www.britannica.com/science/five-factor-model-of-personality
[4] https://dictionary.cambridge.org/dictionary/english/percentage-point
[5] https://www.youtube.com/watch?v=OGVJfcSckUs

Appendix

A–Z Definitions

Affirming the Consequent: A mistaken form of reasoning where a person treats “If A then B” and “B” as enough to prove “A,” even though B could have other causes.

Binary Choice: A forced choice between exactly two options, often labeled A and B.

Conscientiousness: In the five-factor model, a trait linked to organization, follow-through, and careful, responsible behavior.

Extraversion: In the five-factor model, a trait linked to energy, sociability, and outward engagement.

Five-Factor Model: A major personality framework that describes personality using five broad traits.

Intelligence Quotient: A score used in some standardized intelligence tests to express performance relative to a reference group.

Norms: Reference data from a defined group that allow an individual’s test result to be interpreted by comparison.

Openness to Experience: In the five-factor model, a trait linked to curiosity, imagination, and interest in ideas.

Percentage Point: A unit used to describe changes between percentages, where one percentage point equals one percent.

Standardization: The process of developing and administering a test in a consistent way, often including collecting norms so scores can be compared fairly.

Syllogism: A structured argument form where a conclusion is drawn from stated premises, aiming for logical validity.

Key Takeaways

What this piece is about

In December 2025, a small experiment used two-digit numbers to test a tempting idea: that a single number choice can reveal a full psychological profile.

What held up, and what did not

The result was simple. One number is not enough for a real personality profile, but a short sequence of numbers can show common human choice habits, like picking “nice” numbers and trying to avoid obvious patterns.

Why it mattered

The same set of numbers can look “good” or “bad” depending on the goal: matching a uniform model, or merely looking random to another person.

Story & Details

A strange fact opens the door

The scene begins with a quick request for an interesting fact. The answer lands on an octopus: three hearts, and blue blood. Blue, because the oxygen carrier is hemocyanin, not hemoglobin. It is a vivid reminder that the mind loves crisp, surprising details.

A guessing game turns into a test

A different kind of surprise follows: a two-digit number is held in mind, and a guess is made. The first guess is 37, with a simple rule for feedback: “higher” or “lower.”

The chosen number is 82.

A bigger request arrives next. A full psychological profile is asked for, built from that single number, with a scientific explanation. The answer stays cautious: one number can be many things—chance, memory, style, a recent cue, or a cultural favorite. A single pick is too thin for a stable profile. A well-known trap also sits nearby: people often feel that vague, flattering descriptions fit them personally, even when the same text fits almost anyone.

From one number to ten numbers

A single number is small. Ten numbers are louder.

The ten-number set is: 25, 33, 88, 91, 26, 30, 45, 44, 22, 90.

Patterns show up fast. Many choices are “stand-out” numbers: doubles like 22, 33, 44, 88, and easy endings like 25, 30, 45, 90. There are also close neighbors: 25 sits next to 26, and 44 sits next to 45. Under a simple uniform model over 10–99, the amount of “easy” numbers here is far above what would be expected.

A small scoring idea is introduced, using three plain checks:
numbers that pop out,
spread across decades,
and pairs that sit right next to each other.

The scoring is then turned into a 0–100 style scale, with a clear weighting choice: half of the weight goes to the “stand-out” count, and the other half is shared between spread and pattern.

Interactive choices, one swap at a time

An interactive mode follows. The pace is described as fast. The time is described as about ten to thirty seconds. Personal meaning is uncertain. Visually pleasing numbers are preferred. The aim is said to be spreading across the range, even when the details feel unclear.

A single change is proposed: 44 is replaced by 63.

Many more one-step substitutions follow, always keeping the game feel of “one move, then decide.” Several are accepted in a row, including changes like turning 25 into 28, 90 into 12, 22 into 57, 30 into 74, 45 into 47, and shifting 88 into 86. At one point a scoring rule behaves in a surprising way: adding a third “stand-out” number makes the score look worse, not better, and a change is undone to keep the scoring consistent with its own definition.

A theoretical “perfect” score for that model is reached with a set that has no “stand-out” numbers, full decade coverage, and no neighbor pairs.

A new goal: look random to a human

A new target replaces the model target: not “closest to uniform,” but “looks random to a person.”

The set is tuned again with single swaps that reduce obvious signals. Parity is balanced to five even and five odd. Close neighbors are softened. A number that can feel like a year is nudged away. The set moves through several accepted refinements and lands on:

28, 34, 72, 83, 19, 52, 47, 63, 57, 24.

A second polish goal is added: when sorted, big gaps should shrink. The largest gap is reduced by swapping 47 for 43.

One last suggestion is offered to tighten the upper end: replacing 83 with 79. The decision is left open.

A brief Dutch mini-lesson

Dutch is used in the Netherlands (Europe) and Belgium (Europe). The same short phrases fit this number game well.

This sentence is used for a calm, everyday “I do not know.”
Ik weet het niet.
Ik means I. Weet means know. Het means it. Niet means not. The tone is neutral and common in daily speech.

These words help with a simple guessing rule.
Hoger. Lager.
Hoger is higher. Lager is lower. Both are short, plain words, useful for quick feedback.

A clear yes and no can stay simple.
Ja. Nee.
Ja is yes. Nee is no. Both are common and informal-neutral.

Conclusions

A small lesson with a big shadow

A single two-digit number can carry a story, but it cannot carry a full scientific personality profile.

A short sequence can carry something real: how people try to look random, how “nice” numbers pull attention, and how goals change the shape of a result.

In December 2025, the experiment ends with a neat truth: randomness is not only about math. It is also about how the mind wants to be seen.

Selected References

Reading and viewing

[1] https://www.smithsonianmag.com/science-nature/ten-wild-facts-about-octopuses-they-have-three-hearts-big-brains-and-blue-blood-7625828/
[2] https://pubmed.ncbi.nlm.nih.gov/17521494/
[3] https://www.astronomy.com/wp-content/uploads/2024/01/Forer-fallacy-of-personal-validation-1949.pdf
[4] https://science.howstuffworks.com/life/inside-the-mind/human-brain/forer-effect.htm
[5] https://www.youtube.com/watch?v=kgiKT2hSujo

Appendix

Barnum–Forer effect. A common effect where people rate broad, vague personality feedback as highly accurate for them, even when the same text could fit many people.

Coverage. A simple way to describe spread: how many tens groups appear in a set, like the teens, twenties, thirties, and so on.

Executive functions. Mental control skills used to manage attention and habits, such as stopping a routine response and keeping track of what has just been done.

Hemoglobin. An iron-based protein in blood that carries oxygen in many animals, including humans.

Hemocyanin. A copper-based protein that carries oxygen in many mollusks, including octopuses, and can make oxygen-rich blood look blue.

Heuristic. A quick rule of thumb used to decide fast, often helpful, sometimes biased.

Parity. The even-or-odd nature of a number, often used as a quick check when people try to make a set “look mixed.”

Prime number. A whole number greater than one that can only be divided evenly by one and itself, often seen by people as less patterned.

Random Number Generation task. A psychology task where people try to produce a random-looking sequence, used to study common selection habits and mental control.

Salience. How much something stands out and grabs attention, such as repeated digits or very easy endings.

Two-digit number. A number from 10 to 99, small enough to feel simple, but large enough to invite style, memory, and bias.

Uniform selection. A model where each possible option has the same chance, used as a clean baseline for comparison.