When I was in law school I was taking a class on copyright and patent law. I thought it was pretty interesting, thought I might try to go into some kinda law like that.
PHOSITA = Person Having Ordinary Skill In The Art
It's like the "reasonable person" standard, only in intellectual property disputes. At least, that's how I remember it.
I didn't end up doing anything close to intellectual property law. Glad that I didn't -- I don't think I would have found it interesting, in the real world.