What is the CATRA scale? Searching brings up a fictional character from a cartoon, and something to do with knife sharpening.

It's the knife sharpness one, they were referring to people being "sharp", which is another way of saying smart, typically the kind of person who thinks very quickly and nothing gets past them

(hope this doesn't come off as condescending, I'm including these extra details for any non native English speakers because it's kind of a slang word)

The order seems fine to me.

Thermodynamics/statistical mechanics was taught as a junior level class at my undergraduate alma mater. During that year, students would take electrodynamics, classical mechanics, and statistical mechanics as separate classes in some loose order, although of course simpler versions of these topics would have been introduced in first year physics.

The lack of fluid mechanics also, unfortunately, tracks with my experience.

Your experience matches mine, except for the libraries. In my experience at 3 private eastern US universities (two ivy leagues and one liberal arts), all libraries required university IDs or a pass to enter beyond the lobby. I do not know what was required for a non-university person to obtain a pass.

I doubt it. The bullet movement may be chaotic, which means that tiny changes in initial conditions will drastically affect the trajectory, but it is theoretically possible to predict the trajectory. However, it is likely that quantum effects such as the movement of an electron through slits is actually non-deterministic, so we can only predict it in a statistical way even in principle.

This is also my experience with Patreon. Recently, I have been receiving popups from them about opting out of marketing emails. However, they do not seem to save my choices and ask me this every several days.

His books are everywhere in airport bookstores in Canada and the US. I think I have also seen them in large bookstores, such as Indigo.

A few months ago, the Canadian government chose to prioritize first doses first. I know the BC government changed their vaccination schedule after this announcement such that everyone should be able to get their first dose by June or July. https://news.ycombinator.com/item?id=26360556

I believe this was addressed in the first few paragraphs of the article: this problem is not about 'information', which is a vague phrase. Rather, it is about how black hole evaporation is fundamentally time irreversible.

but wasn't the evaporation of black holes a suggested solution by hawking for information being "lost forever" in a black hole?

i.e., hawking radiation is itself unconfirmed, so its a "solution" for something that remains unproven :|

Right, but that is using a semi-classical calculation, whereas we know that ultimately any process (evolution of a closed system like the universe) compatible with quantum mechanics needs to be unitary/reversible.

That mismatch is what sets up the BH information “paradox”.

But every side faces the sun at some point. The first paragraph of that article even says so.

I have the opposite experience on this site. I am not a software engineer, so every time I see the word "go" in a submission title, my first thought is of the game.