[AntiGuv]

I'll give you some examples to work with:

ad hominem: Richard Dawkins is a Marxist, therefore his views on evolution have no credibility.

not ad hominem: Richard Dawkins is a Marxist, therefore he's worthy of contempt.

[jwalsh07]

Did you post that ad hominem example to make clear that not once have I mentioned Dawkins and science on this thread?

Thanks. :-}