atomflunder

IANAL, but 99% sure that the situation in Germany is that you have to identify yourself (give name, birthday, (address?)), but you /don‘t/ have to carry (or show) your government issued ID at all times.

I don‘t think this metaphorical coin exists in London, which is the location that the tweet is talking about.

I worked through large parts of PQP ([1]) with only the prerequisites that you state, as part of a Uni course taught by Aleks Kissinger. I got quite comfortable with the formalism and could solve most problems without too much issue, but at the end I still knew nothing at all about quantum physics. YMMV

I think you are kinda right in that it might be very hard to get people out of homelessness, but what more housing could do is prevent homelessness in the first place.

Presumably most people start their lives as not homeless, and at some point that changes, because housing prices exceed their income. More housing would lead to lower housing prices and less homelessness.

„Whenever I think a country has rules that are tyranny it is my duty to go there“ is a weird take

If you want to counteract this tendency, consider getting them into (competitive) sports. Nothing will work right away, they will have to „grind“ (train/practice) a lot, failures are all but certain; but hard work and perseverance get rewarded, and the successes are all the sweeter. As a young guy who has had a modern and easy childhood not unlike the one you describe, many of my most cherished memories come from competing in a sport.

I travel between Italy, Austria, Germany and Switzerland somewhat regularly, not rarely passing through 3 of the 4 countries for a given trip. I use the Austrian national railway‘s (ÖBB) app to book my tickets, I get a single QR code on my phone that is valid for all legs of my journey, gets scanned by the personnel of whatever country‘s railway company, and I‘m good. Never had any problems whatsoever.

I don‘t think it‘s true that there is no competition in the example you give, rather competition simply happens along a differen axis.

In the open source space there are certain characteristics that make your project more likely to succeed. Being, well, open is obviously one of them, just like passing emission tests is a factor in cars. So, open source projects have to be competitive along the openness axis in order to succeed, just like VW needs to pass these tests, one way or the other. To me it seems like the same mechanism really, just fed with different incentives.