Thanks to Prometheus I got a chance to actually hear Cosby's speech. To be fair to Dr. Cosby, I wish I could've heard the entire transcript. No telling what type of editing the Post did (and I don't say this out of any conspiratorial bent).
But as it stands he's still making a specious argument. That is what he says SOUNDS like common sense until you deconstruct it and locate the causal flows. They're all wrong.
And on top of that, he isn't all that funny.