Tu quoque

From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about the logical fallacy. For the historical quotation "Tu quoque, Brute, fili mi", see Et tu, Brute? For the play by John Cooke, see Greene's Tu Quoque.


Tu quoque (/tˈkwkw/;[1] Latin for, "you also") or the appeal to hypocrisy is an informal logical fallacy that intends to discredit the validity of the opponent's logical argument by asserting the opponent's failure to act consistently in accordance with its conclusion(s).

Tu quoque "argument" follows the pattern:

  1. Person A makes claim X.
  2. Person B asserts that A's actions or past claims are inconsistent with the truth of claim X.
  3. Therefore X is false.[2]

An example would be

Peter: "Based on the arguments I have presented, it is evident that it is morally wrong to use animals for food or clothing."
Bill: "But you are wearing a leather jacket and you have a roast beef sandwich in your hand! How can you say that using animals for food and clothing is wrong?"."[2]

It is a fallacy because the moral character or past actions of the opponent are generally irrelevant to the logic of the argument.[3] It is often used as a red herring tactic and is a special case of the ad hominem fallacy, which is a category of fallacies in which a claim or argument is rejected on the basis of facts about the person presenting or supporting the claim or argument.[4]

See also[edit]

References[edit]

  1. ^ "tu quoque, n.". Oxford English Dictionary. Oxford University Press. 2012. Retrieved 24 April 2016. 
  2. ^ a b "Fallacy: Ad Hominem Tu Quoque". Nizkor project. Retrieved 24 November 2015. 
  3. ^ Bluedorn, Nathaniel (2002). The Fallacy Detective. p. 54. ISBN 0-9745315-0-2. 
  4. ^ "Logical Fallacy: Tu Quoque". Fallacyfiles.org. Retrieved 2014-06-17. 

Further reading[edit]