Fiction is fake. Non-fiction is non-fake.
LOL, sure thing Mr.Library! LMAO. 
I mean, I think that's how it is. I don't know for sure, you know? I basically just guessed. Let's go ask some nerds, I'll bet they know. OK?
hi! i'm a scientist! would you like some fiction with your tang and sushi?
sure mr. scientist. i happen to have a bowl of cavier that i'm drinking with my martini, should i include some non-fiction?
well, since my expert science experiments require me to wear a tuxedo, i think i'll take both!
ok!