I can't comment on the use of "Uncle Tom" specifically.

But we ought not to use insults like that ever. By using them on people who "deserve it", we are basically saying these terrible things are true, but we usually don't say them because it's rude. A better way to think is that we don't use discriminatory insults/slurs because the hatred they represent is completely without merit.

You can't dismiss with prejudice because of a simple jurisdictional issue like that. "You should have filed it somewhere else, but now you can't file it anywhere". Prejudice means that the case has no merit and saying you should have filed it somewhere else indicates it is possibly meritorious.

Using a fusion reactor to power a solar collector to fuel a fusion reactor.

Wow. Yeah, even if they literally just had it in a bank account, which I think can't even be considered an investment, the interest on that would be very substantial.

These have always been potential benefits of crypto. If paypal makes these actually attainable without all the other burdensome bullshit that would be awesome.

Retarded means slowed, inhibited. One common use is a bread retarder, which a temperature controlled box you put dough in to slow the fermentation process. Retarded was also used scientifically to describe someone with an intellectual disability. While this sort of conception is out dated, they would describe someone's disability in terms of "having the mind of a 9 year old", so the relationship between the disability and time/slowed progress seemed really straightforward. At some point, saying a person was retarded transformed from being a scientific designation without prejudice to an insult for intellectually capable people who had done something foolish, and then eventually any misbegotten situation would be called retarded. There has been a movement both to use better language for the disabled community (hence me using the term intellectual disability) as well as stop using the word retarded as a pejorative.