Imagine some of the posters having any capability for reflection and thus realising the irony in the… dubious product of their loquaciousness.
I’m not even talking about something like Gödel’s theorems — that’s probably too complicated for a redneck to grasp. For starters, I’d suggest a much simpler exercise: can those who believe they ‘can’t prove a negative’ prove it, i.e. that they ‘can’t prove a negative’? 
But I suppose I’ll not go much further into this, since I find harbouring any illusions about the prospect of educating this particular… audience not prudent. Another ‘thought experiment’, if you will: imagine encountering an ordinary pile of dung lying on a road. You can provide solid arguments to it, display brilliant logic and masterful rhetoric skills, but your particular… ‘opponent’ in this discussion would just lie there, generally stink and not budge. I find this metaphorical pile a much more reasonable and socially acceptable ‘person’ then many… orators with their particular ‘opinions’ here, by the way. What? At least it’s not aggressive in its ignorance.