(12) I'll leave you to do an internet search for that term. I had to, thanks to not learning it in the crappy Marxist 1990s degree program I bought instead of a down payment on a home.
I believe anyone with an IQ over 60 can & should use the internet to learn about previously baffling academic subjects in which they are interested.
When people refuse, they're either being lazy, or acting in bad faith. So I make no apologies for mocking them after they've falsely accused me of incivility.