My opponent raises a good point, but can we really trust him? I mean, he moved to this town only two years ago and everyone knows that his wife left him*

A) Slippery Slope: Exaggeration ir the likely consequences of an action, designed to show that a misstep today could result in a disaster.

B) Appeal to False Authority: Presenting an unqualified person or institution as a source of credible information.

C) Faulty Causality: Incorrect assumption that one event caused another event. Correlation does not imply causation.

D) Ad Hominem: In Latin, this means to the man. When you attach a person’s character instead of the quality of his/her ideas. Tu quoque is a specific type of ad hominem when you basically call someone a hypocrite instead of debating his/her ideas.