irrationale

like a rationale, but insane rationally!
something people base conversations, politics, ways of being or actions on that makes no sense, or is based on a logical fallacy.

eg: James has got a parking ticket, therefore he doesn't respect society and should be stopped!

person 1: James has got a parking ticket, therefore he doesn't respect society and should be stopped!
person 2 (in their own head): that's an irrationale.