I think it’s dark matter. There are so extremely many theories around it and it’s very hard to measure experimentary.

Differentiable programming. Differentiable ray tracers for example can be used to reconstruct the geometry of something you took a picture off.

Was wird mit den Enten gemacht?

Why are you mad at the salvation army?

So Elon musk is one I guess

To be honest I think you can compare them, I feel the word idiot is misplaced here.

It’s all in the Wiki

Yes, a 3000 page pamphlet