Logical reasoning, cause and effect.
Johnny, you are my friend but you are an asshole!
Am I an asshole because I’m your friend; or
Am i your friend because I’m an asshole?
Johnny, you are my friend but you are an asshole!
Am I an asshole because I’m your friend; or
Am i your friend because I’m an asshole?
False logic.
That’s why it’s in the JOKES or FUNNY category, duh!