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Line 9: − − == Example == − The statement − − :'[[Richard Wagner]] was an opera composer much admired by the Nazis' − − might be considered an ad hominem attack on Wagner's music. It is true, and in some contexts might be a relevant comment. But if someone says it in order to suggest that Wagner was a bad composer, then it's an ad hominem attack, because whether some bad people liked his music is not a relevant comment on the quality of his music. Line 28:
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Taking out an extraneous space
#REDIRECT [[New Atheism leadership's problem with excess weight]]
#REDIRECT[[New Atheism leadership's problem with excess weight]]
An ''argumentum '''ad hominem''''' ([[Latin]]: "argument against the man"), is a [[logical fallacy]] consisting of denigrating one's opponent or otherwise introducing irrelevant premises about one's opponent, instead of dealing with the flaws in the form and function of the opponent's argument. Note that the statement made in an ''ad hominem'' argument does not have to be false for this type of fallacy to have been committed; it just has to be irrelevant to the topic of the debate.
An ''argumentum '''ad hominem''''' ([[Latin]]: "argument against the man"), is a [[logical fallacy]] consisting of denigrating one's opponent or otherwise introducing irrelevant premises about one's opponent, instead of dealing with the flaws in the form and function of the opponent's argument. Note that the statement made in an ''ad hominem'' argument does not have to be false for this type of fallacy to have been committed; it just has to be irrelevant to the topic of the debate.
# A has a flaw in his character, or else his circumstances mean that X somehow serves a special interest of A, etc.
# A has a flaw in his character, or else his circumstances mean that X somehow serves a special interest of A, etc.
# Therefore X is false.<ref name=Nizkor>The Nizkor Project, [http://www.nizkor.org/features/fallacies/ad-hominem.html Fallacy: Ad Hominem] (retrieved April 9, 2007)</ref><ref name=Lander>Lander University, Department of Philosophy, ''[http://philosophy.lander.edu/logic/person.html Philosophy 103, Introduction to Logic: Argumentum ad Hominem]''. (Retrieved April 9, 2007)</ref>
# Therefore X is false.<ref name=Nizkor>The Nizkor Project, [http://www.nizkor.org/features/fallacies/ad-hominem.html Fallacy: Ad Hominem] (retrieved April 9, 2007)</ref><ref name=Lander>Lander University, Department of Philosophy, ''[http://philosophy.lander.edu/logic/person.html Philosophy 103, Introduction to Logic: Argumentum ad Hominem]''. (Retrieved April 9, 2007)</ref>
== Why Ad Hominem is Objectionable ==
== Why Ad Hominem is Objectionable ==
In a special form of ''ad hominem'' that is closely akin to [[special pleading]], a debater attempts to deflect criticism of himself by asserting that his opponent has the identical character flaw. This form is called ''tu quoque'' ([[Latin]], "thou too"). The proverbial expression of this fallacy is "It takes one to know one" or "Let the pot call the [[kettle]] black."<ref name=Warburton>Nigel Warburton, ''Thinking from A to Z'', 2nd. ed., "Politician's Answer", pp. 103-104. Retrieved April 9, 2007, from [http://www.fallacyfiles.org/tuquoque.html The Fallacy Files]</ref>
In a special form of ''ad hominem'' that is closely akin to [[special pleading]], a debater attempts to deflect criticism of himself by asserting that his opponent has the identical character flaw. This form is called ''tu quoque'' ([[Latin]], "thou too"). The proverbial expression of this fallacy is "It takes one to know one" or "Let the pot call the [[kettle]] black."<ref name=Warburton>Nigel Warburton, ''Thinking from A to Z'', 2nd. ed., "Politician's Answer", pp. 103-104. Retrieved April 9, 2007, from [http://www.fallacyfiles.org/tuquoque.html The Fallacy Files]</ref>
== Ad Hominem Not Always Fallacious ==
== Example ==
The statement
:'[[Richard Wagner]] was an opera composer much admired by the Nazis'
might be considered an ad hominem attack on Wagner's music. It is true, and in some contexts might be a relevant comment. But if someone says it in order to suggest that Wagner was a bad composer, then it's an ad hominem attack, because whether some bad people liked his music is not a relevant comment on the quality of his music.
== Ad Hominem Arguments Are Not Always Fallacious ==
* The ad hominem attack is usually fallacious, and becomes reasonable ''only'' when the consideration being advanced is directly relevant to whether the other person is generally truthful or reliable, or whether he is telling the truth in this instance, or whether he is engaged in a logical fallacy of his own. The usual case occurs when the other person is engaging in [[special pleading]].<ref name=Lander/> Exposure of special pleading is a valid counterargument--so long as the accusation itself is valid. Technically, this is ''not'' an example of ''ad hominem'', because it is an attack on the specific argument and/or the evidence advanced to support it.
* The ad hominem attack is usually fallacious, and becomes reasonable ''only'' when the consideration being advanced is directly relevant to whether the other person is generally truthful or reliable, or whether he is telling the truth in this instance, or whether he is engaged in a logical fallacy of his own. The usual case occurs when the other person is engaging in [[special pleading]].<ref name=Lander/> Exposure of special pleading is a valid counterargument--so long as the accusation itself is valid. Technically, this is ''not'' an example of ''ad hominem'', because it is an attack on the specific argument and/or the evidence advanced to support it.