factstonian
A person who acts like the whole world depends on him knowing every single fact ever discovered and won't let anyone else speak unless they prove it with evidence.
'You can't just say the moon is made of cheese. I need three different scientists to back it up.'
'If you don't show me a video of it, I won't believe you saw a unicorn.'
'I don't believe you lost your keys unless you prove it with a witness and a police report.'