Factinista
A factinista is a person who yells at you for not knowing things they read in a book. They think they're gods.
A factinista screamed at me, 'You're wrong! The book says the earth is flat!' I said, 'It's not.'
My brother is a factinista. He won't stop telling me I'm stupid for not knowing stuff.
I asked a factinista why cats sleep so much. She said, 'Because the book says so!'