"Logical fallacy", he whined

M.C. Barsenas, February 8, 2005:

Who is John Derbyshire? A doctored professor of evolutionary science? Nope. He's a writer for the National Review. Can anyone say a fallacious appeal to authority? I surely can.

M.C. Barsenas's imaginary friends, March 5, 2005:

Matt: Alright, first I'll deal with the latter assertion.
Bob: The one where theologians don't know anything about atheism?
Matt: Yes, that one. See Bob, that argument is called a genetic fallacy. Here, let me get an elementary logic book. See, right here.
Bob: Good and well, but what does it mean?
Matt: It means that the source of information does not affect the truth value of the information. For instance, if it was written on a bathroom wall that the earth revolved around the sun, I could not reject the assertion merely because it was written on the bathroom wall. Do you see?

(Thanks to my brother Brad for catching this.)