Fact gremlin
A person who will talk about facts like they're the only thing that matters, even if they’re completely wrong and don’t know what they’re talking about.
They told me the Earth was flat, and then got mad when I said it’s not.
They explained how the moon was made in a 5-minute rant that no one understood.
They got into a debate about the number of letters in the alphabet and lost because they thought it was 27.