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It would be 24 if all digits are distinct

It actually drops from 10^4=10000 to 4^4=256 combinations


If they aren't distinct, you wouldn't have 4 clean buttons, but just 3 - in which case we also know the repeating digit repeats exactly once and we get 12x3 (36) possible combinations. With two clean buttons, it's 6 (if both repeat) + 4 (if only one repeats) = 10 and if there's 1 that's just one, and a terrible password.


With 2 clean buttons, there are 4x2 ways for only 1 to repeat, giving 14 combinations in total.


I encountered a case of this in college, where there were four clean digits - a tough task to be sure! But fortunately the digits happened to be the same set of digits that comprised the room number. It took two guesses, because there was a twist - the combination was the room number, backwards.


I guess you would be able to count the number of clean keys and thus know both the number of distinct digits and the digits (but not the order nor which digit that's repeated)


The number that is repeated is likely to be dirtier than the numbers that are not so you get that information too.


There's RStudio with its WYSIWYG "visual"[1] editor for markdown(ahem, rMarkdown or quarto, which are pandoc's markdown + extensions). It is quite feature-rich albeit I am unsure whether it supports wrapping images. I bet you can write a little inline CSS in a fenced div[2][3] for it, but it is likely not an option for casual user. What it does support is rendering all the goodies in plethora of output formats[4]: docx pdf, html for plain documents; revealjs(html), pptx, beamer(pdf) for presentations. You can even generate websites with it As for spreadsheets, RStudio supports both R and python which are incredibly powerful for manipulating and visualizing table-like data

I won't argue that those are easy tools to learn, but if you do, you have much more power than with MS/{word,excel,powerpoint}

[1]: https://rstudio.github.io/visual-markdown-editing/

[2]: https://pandoc.org/MANUAL.html#extension-fenced_divs

[3]: https://stackoverflow.com/questions/76421783/text-and-image-...

[4]: https://quarto.org/docs/guide/


If there is something really important worth rereading over and over again, put «NOTE: » before it and let your editor highlight it for readers of your code



Well, reading blogs without any incentive to earn money is quite addictive too. Same for HN


How does that solve the problem?

Judging by my previous addiction, I would say youtube desktop and youtube mobile experience is on par, also I believe TikTok is more comfortable on mobile(I never used it though). Same applies for the rest of social media. When you are sitting in a class and splitting your attention between what is being taught and your distraction, that distraction is unlikely to be some serious activity, because serious activities demand full attention

So you have a choice:

- make-yourself-a-desktop which is time-consuming, has dubious reward(what linux can do that Windows/MacOS can't?[1]) and is not comfortable to use everywhere

- phone that gives you all the means to distract yourself, is always in your pocket and requires no effort

If you don't explicitly aim to avoid the latter path I don't see any reason to choose your method

[1]: Having said that, I would never put windows on a personal computer. Answering my own question, there are certainly needs where Linux fits better, but for general desktop not so much


In a simple way: when you start using a device, not a drug, you not start to get high, you just want using it. If you discover, BEFORE YT and co, how to use a desktop and you are smart you can start doing smart thing with it and loving doing them.

Like putting a smart child in a library and let him/her read. Oh even if the child get YT on desktop, a properly configured one, with uBlock and so on, no, the experience is not on par with the mobile, it's far better, and the fact you do not live on a chair avoid the mechanism of having a device always with you: the mobile experience, even with DNS-based ads filtering is so horrific no one want if IF he/she already know the desktop one, and that's they key: you might eventually get addicted to desktop, but you have a life and a desktop, with a proper monitor, mechanical keyboard, a trackball etc does not came with you in your pocket. You can pass hours on it, but not as much as on a phone and you can't be bound to it while you live your life like those who chat on a phone at a restaurant.


> I imagine many of the students there don't really care about physics.

It might be, but AFAICS the study was conducted at Harvard and I believe students at prestige universities have much more will to study. If they chose physics, they are likely interested in it


I saw video "do that if you are forced to enter your card PIN" where they tell you to enter your PIN backwards, which will allegedly be accepted as a usual PIN, but additionally notify authorities.

Unfortunately none of the banks I was client of did that


I think that's an urban legend. it appears to work sometimes as some ATMs don't do anything with the provided pin until you get further in the transaction. A surprising number of ATMs also do "offline" verification, where the card itself is the only thing validating the pin and the transaction is send back to the card processor later.


Aren't most of the replies critic or posted by people disagreeing with you though? Especially on HN, where most users would promote discussion with a reply rather than «Agreed» or «lmao»


Agreed lmao


While android base is open source(and I appreciate google for that), no major phone vendor uses exclusively open source components. They always adds own proprietary apps and services also most of the time google's. IMO no better than an iphone.


That's the anti-trust thing.

If Google still wanted to "don't be evil" they'd switch to a license that requires OEMs to allow the user to install custom Android forks on the device.


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