The Walking Dead handled this topic. Shitty people will still be around, but their opinions don't matter anymore. The only thing that matters is working together to survive. And as much as you say that it takes an institution to enforce equality, it takes an institution to hold a group of people down as well. So unless the survivors are mostly racist/sexist, it really won't be an issue. It's not human nature to discriminate, that is a learned trait.

Hahahahaha.... Just go listen to a t-pain song, you will know.

It's super easy to hear auto tune, but it is getting harder as tech improves. If you want to get an ear for it, listen to older examples. T-pain was the biggest early user and once you hear his stuff, you will be able to pick it up in everything.

Once saw on a Chinese menu. "Chinese food to eat 10 or take out"

You mean like how Russian troops inside Belarus massed at the Ukraine border and invaded Ukraine?

Heavy elements are also created in supernova explosions. I think that's where most of them come from as opposed to fusion within a star.

Takes one to know one

There has to be a river/stream system feeding the lake. And at some point or another that system was connected to other bodies of water. Entire parts of every continent used to be under water. There are flood events that can spread wildlife. They can also be spread by migratory birds.