Is it a common mistake for Americans to say "I could care less" instead of "I couldn't care less"?

Yeah, you've got exactly what it means. It's kind of like a "go on" type of phrase to continue the conversation. In your example it's like a really short version of something like "You have a gift for me?

What is it?" "You do?" It's a response to get the information. Does that make any sense?

No. Americans are very informal compared to europeans (im american). So in that context "you do" is by far the most common thing an american would say.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.