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2. Reason / F. Fallacies / 7. Ad Hominem

[attacking an opponent's motives instead of their arguments]

4 ideas
Ad Hominem: press a man with the consequences of his own principle [Locke]
An ad hominem refutation is reasonable, if it uses the opponent's assumptions [Harte,V]
We should always apply someone's theory of meaning to their own utterances [Liggins]
The Ad Hominem Fallacy criticises the speaker rather than the argument [PG]