Tu quoque

This article is about the 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 (/tjuːˈkwoʊkwi, tuːˈkwoʊkweɪ/; Latin for "you also"), or the appeal to hypocrisy, is a fallacy that intends to discredit the opponent's argument by asserting the opponent's failure to act consistently in accordance with its conclusion(s).

The fallacy

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.

An example would be

Peter: "Bill is guilty of defrauding the government out of tax dollars."

Bill: "How can you say that when you yourself have 20 outstanding parking tickets?"

It is a fallacy because the moral character or actions of the opponent are generally irrelevant to the logic of the argument. 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.

Example

In the trial of Nazi criminal Klaus Barbie, the controversial lawyer Jacques Vergès tried to present what was defined as a Tu Quoque Defence—i.e., that during the Algerian War, French officers such as General Jacques Massu had committed war crimes similar to those with which Barbie was being charged, and therefore the French state had no moral right to try Barbie. This defense was rejected by the court, which convicted Barbie.

See also

• And you are lynching Negroes
• Clean hands
• False equivalence
• List of Latin phrases
• Psychological projection
• The pot calling the kettle black
• Two wrongs make a right
• Victor's justice
• Whataboutism

Further reading

• Agassi, Joseph (2008). "Rationality and the tu quoque argument". Inquiry. 16 (1–4): 395–406. doi:10.1080/00201747308601691.
• van Eemeren, Frans H.; Houtlosser, Peter (2003). "More about Fallacies as Derailments of Strategic Maneuvering: The Case of Tu Quoque". University of Windsor.
• Govier, Trudy (1980). "Worries About Tu Quoque as a Fallacy". Informal Logic. 3 (3): 2–4.
• Shapiro, Irving David (January 2011). "Fallacies of Logic: Argumentation Cons" (PDF). Etc. 64 (1): 75–86.
• Marcus, Kenneth L. (2012). "Accusation in a Mirror". Loyola University Chicago Law Journal. 43 (2): 357–93. SSRN 2020327.

External links

• Tu quoque fallacy – Internet Encyclopedia of Philosophy