Although funnily enough, when one of the questioned about if his wife had an affair with afroman he was like "I dunno". If he doesn't know it's a lie, kinda defeats the point of the defamation suit

To be fair, this raises an interesting question of epistemology. Can any man know for sure that his wife has never had sex with Afroman? It's almost always possible, however unlikely. One can and probably should trust that his wife hasn't had sex with Afroman, but it's rarely possible to be absolutely certain.