Thank you, coyoteman, for the gentle reply. But is verbal abuse a good way to convince people?
It's certainly called for when they're knowingly lying in a dishonest attempt to confuse the reader, yes.
And treating a liar more gently only gives the liar a graceful "out" which he in no way deserves, and at the same time it may give viewers of the discussion the false impression that it's just a minor disagreement over details, and not the liar caught red-handed trying to pass a lie off to the audience.
A verbal ass-kicking is very much called for.