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Is there a standard name for a fallacy of the same form as an ad hominem, except that instead of denouncing the opposition, it praises the defense?


Typically an ad hominem ("against the man") fallacy of (ir)relevance is described as requiring abuse:

Bob favors Y.
Bob is a lazy shiftless loser.
Therefore, Y is false.

In a sense, before the fallacy, Bob is somehow neutral, (as are Y and not-Y); after the ad hominem, Bob goes down a peg in the listener's esteem, which for an uncritical listener seems to put Y down a peg too. Therefore Not-Y is "above" Y.

Relatively speaking it doesn't much matter if either Y goes down a peg, or Not-Y goes up one, so long as one of them moves in the desired direction. The fallacious goal being to put Not-Y above, which can also be done by praising the defender of Not-Y:

Bill favors Not-Y.
Bill is a hard worker, and in 2012 was awarded the coveted Gilded Nostril.
Therefore Not-Y is true.

Other than the relative motions involved, (analogous to addition with positive and negative integers), the invalid form of both is the same. In the field of public discourse, both forms appear to be equally common. Bureaucracies seem to use the praising form more.


Abstracting both forms into one, an irrelevant but prejudicial personal attribute replaces (or overshadows) a premise, which incorrectly prejudices listeners to accept an unsupported and therefore invalid conclusion:

Bilbo favors Y (or not-Y).
Bilbo is naughty (or nice).
Therefore, Y is false (or not-Y is true).
agc
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    argument pro hominen? –  Dec 28 '16 at 00:50
  • @mobileink, something like that... not too sure about the Latin grammar tho'. If no standard term exists perhaps such a coinage would be better than nothing. – agc Dec 28 '16 at 07:25
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    not sure about the Latin myself, but pseudo-latin comes in handy when you need it! –  Dec 28 '16 at 22:12
  • @user20153 That was my first thought too, but actually, "ad" (in this context) means "to" (as used in Mr.Kennedy's answer; I had to look it up), not "against", so "ad hominem" makes sense in this case. ("pro" might also make sense, but a different term is not required.) – John B. Lambe Nov 23 '18 at 17:10
  • for gilded nostril.
  • – user4894 Nov 25 '18 at 23:12
  • This sounds like appeal to irrelevant authority, an example "would be citing Albert Einstein as an authority for a determination on religion". – Conifold Nov 26 '18 at 22:39
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    It is still ad hominem. It does not matter whether the irrelevant aspects of the person addressed are positive or negative, they are not relevant... 'Ad' does not mean 'against', it means 'toward', without the implication of hostility or difference (cf. adjustment, or even adoration...) (or 'at', but in the sense of actually being near.) –  Nov 27 '18 at 02:17
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    What is the term for someone who assumes that someone with a different idea than them is attacking them personally? – Christo Patrick Mar 16 '19 at 16:50
  • @jobermark, 'Ad' means toward, but SFAIK every usage and definition of ad hominem implies "the man" signifies the opposition, not the defense. – agc Nov 06 '19 at 04:51
  • @agc Then check a dictionary -- the second definition in Merriam Webster is the original Latin meaning: "in a way that relates to or is associated with a particular person." The fact that in our minds arguments (especially illogical ones) are more often 'against' than 'for' what they are oriented 'toward' is just a cultural bias –  Nov 07 '19 at 22:08
  • @jobermark, Sorry, it seems my comment was unclear. 2nd try -- in English we have argument to the man, (where "the man" signifies the opposition), not to a man, (which might refer to anyone). This target object distinction might make a good grammar Q. for LatinLanguage.SE. – agc Nov 08 '19 at 20:13