Quite a shame how people respond

[little_monkey]

that your ad hominem attack doesn't prove your case

Don't do it without making your case. Pretty simple. It has nothing to do with proof.

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Also, calling someone a twat doesn't automatically mean you're making a fallacy when speaking to them - simply that you insulted them. It depends on how you construct the thing and why.

I'd beg to differ on the loss of argument. Sometimes you have to call a spade a spade. The rest stands or falls on its own.

Well, I have indulged myself in that. So, guilty I am. But just look at Dawkins, just because he often swears and uses cuss' word in his public discourse, theists have pounced on that to derail his message. It's bad strategy when you give your opponent live ammunition.