Factinista
A factinista is a person who thinks they're the smartest person in the world just because they read a book. They'll argue with you for hours.
A factinista yelled at me, 'You're wrong! The book says so!' I said, 'The book is wrong.'
I asked a factinista why the sky is blue. She said, 'Because the book says so!'
My mom is a factinista. She won't let me play video games unless I read a book first.