Reasophobe

Somebody with reasophobia, which means they can't accept a good reason why something isn't real. Somebody can try to reason a reasophobe, but it usually never works.

Elyse: For the last time, Tom! You can't date or marry a motorcycle!
Tom: I'm attracted to motorcycles! It's called motorsexuality!
Layla: That's not a thing, Tom.
Carl: When are you going to finally understand, Tom?
Tom: Understand what?
Drake: That you can't date or marry objects!
Tom: Whatever you guys are motorphobes.
Layla: And you're a reasophobe.