Ad Hominem
Informal
The ad hominem attack is a
logical fallacy associated with trying to undermine the opponent's arguments by personal attacks, through attacking their character or skill level, etc. The ad hominem attack uses an accepted fact about a person to undermine their credibility despite the lack of causal connection between the two parts of the argument.
"This message board is full of idiots"
Appeal to Authority
The
fallacy of appeal to authority makes the argument that if one credible source believes something that it must be true.
"Well, if you can do better why aren't you coaching/on the field?"
Appeal to Emotion
The
fallacy of appeal to emotion makes a claim based on sympathy or empathetic instead of just or logical grounds.
"Quit being a pussy!"
Caveman Argument Resolution
The
fallacy of caveman argument resolution is based on the argument that the person making a claim would not confront the person he is making the claim against therefore the claim is not valid.
"I bet you wouldn't say that to his face"