Tu Quoque: "You Do It Too!" — The Appeal to Hypocrisy
A parent tells their teenager to stop smoking. "But you smoke!" the teenager fires back. A politician argues for fiscal austerity while expensing lavish dinners. "Who are you to talk about spending?" says the opposition. A country lectures another on human rights abuses while operating secret detention facilities. "Look at what you do!" comes the reply. All of these are instances of tu quoque — and all of them share the same logical flaw: they deflect, but they never actually answer.
What Is Tu Quoque?
Tu quoque (pronounced "too KWO-kwee") is Latin for "you also" or "you too." It is a form of logical fallacy in which a criticism or argument is dismissed by pointing out that the critic is guilty of the same behaviour, or held the opposite position at some earlier time. Rather than addressing whether the claim is true, the tu quoque manoeuvre redirects attention to the supposed hypocrisy of the person making it.
It is classified as a subspecies of the Ad Hominem fallacy — an argument against the person rather than the argument. The distinguishing feature is the specific structure: you can't criticise X in me because you also do X (or did X, or benefit from X).
The Classic Dialogue
The canonical form of tu quoque unfolds in a simple three-step pattern:
- Person A makes a claim or criticism: "You should stop eating so much sugar."
- Person B points to A's own behaviour: "You ate a whole chocolate cake last week."
- The original claim is treated as thereby refuted.
But notice what step 3 actually accomplishes: nothing. Whether or not A ate a chocolate cake has no logical bearing on whether B should reduce their sugar intake. The advice might be medically sound or medically dubious — that question is entirely separate from whether the advisor is themselves a perfect example of the behaviour they recommend.
Why It Feels Compelling
Tu quoque arguments are pervasive because they tap into genuine human intuitions about fairness, consistency, and moral authority. These intuitions are not entirely wrong:
- We value consistency. A person who holds others to standards they don't meet themselves seems hypocritical — and hypocrisy is a real moral failing.
- We judge credibility partly by behaviour. A doctor who smokes heavily when advising patients to quit seems less trustworthy, not only morally but epistemically.
- We notice that inconsistency sometimes signals bad faith. Someone who suddenly discovers a principle only when it's convenient to attack others may not genuinely hold that principle.
All of these concerns can be legitimate — but none of them address the substance of the original claim. Hypocrisy makes someone a poor moral model; it does not make their factual claims false or their logical arguments invalid.
Historical and Political Instances
The Nuremberg Defence
One of the most consequential uses of tu quoque in history came at the Nuremberg Trials after World War II. Several Nazi defendants invoked tu quoque as a formal legal defence: arguing that Allied powers had also committed war crimes (strategic bombing of civilian populations, internment of Japanese Americans, Soviet mass executions) and therefore lacked standing to try German defendants for similar conduct. The Nuremberg Tribunal rejected this defence explicitly, establishing that the illegality of one party's actions does not legally or morally excuse another party's crimes. The validity of the charges did not depend on the purity of the accusers.
Political Debate
In contemporary political discourse, tu quoque is almost impossible to avoid. Party A attacks Party B for deficit spending — B counters that A ran deficits too. Party A accuses B of surveillance overreach — B notes A passed similar legislation. Neither response addresses whether the criticism is correct; both are attempts to neutralise the attack by creating a kind of mutually assured embarrassment.
International Relations
Countries routinely respond to human rights criticisms with tu quoque: "Look at your own prisons. Look at your own police." The criticism may be entirely accurate and well-intentioned on both sides, but the tu quoque response treats the hypocrisy of the accuser as sufficient reason to ignore the underlying issue — which it never is.
Tu Quoque vs. Legitimate Consistency Arguments
There are situations where pointing to apparent inconsistency is not fallacious:
- Exposing double standards: If Party A says behaviour X is wrong when Party B does it, but acceptable when Party A does it, this is a genuine inconsistency worth examining — but the correct response is to demand consistent application of the principle, not to use A's behaviour to justify B's.
- Questioning authority claims: If someone explicitly justifies their advice by their personal example ("Do as I do"), then revealing they don't practise what they preach is relevant. It undermines the specific authority they claimed — not the argument itself.
- Detecting strategic hypocrisy: Sometimes hypocrisy genuinely signals that a principle is being deployed in bad faith — selectively, opportunistically. Noting this can be relevant to evaluating the speaker's sincerity, even if it doesn't address their argument.
The difference: legitimate consistency arguments address the principle being applied inconsistently. Tu quoque uses personal inconsistency to avoid addressing the argument altogether.
Connection to Burden of Proof
Tu quoque is often used as a diversionary tactic to shift the conversational focus — to make the argument about the critic rather than the claim. This connects to the Burden of Proof fallacy: instead of providing evidence or reasoning in response to a challenge, the tu quoque throws the argument back at the challenger without addressing their point. It's a way of evading responsibility for one's claims by putting the other person on the defensive.
In Everyday Life
Tu quoque is not just a feature of grand political debates. It appears in family arguments, workplace discussions, and friendships with remarkable frequency:
- "You're always late!" / "You were late last Tuesday."
- "You should read more." / "You watch TV every night."
- "You spend too much money." / "You bought a new bike last month."
In each case, the response — even if factually accurate — fails to address whether the criticism is correct. It merely shifts the accusation. Both people can be late; both can be sedentary; both can be overspending. The tu quoque establishes nothing except that the dispute involves mutual imperfection — which, in human relationships, is almost always true.
Responding to Tu Quoque
When you encounter this fallacy — or catch yourself using it — the most intellectually honest move is to separate two questions:
- Is the criticism substantively correct?
- Is the person making it consistent in applying it?
These are independent questions. Both can be addressed, but they need to be kept separate. A hypocritical person can make a valid point. A consistent person can make a false one.
In practice: acknowledge the apparent inconsistency if it's genuine ("You're right that I've done the same thing — let's talk about whether it's a problem for both of us"), but don't let that acknowledgement substitute for engaging with the original claim.
Summary
Tu quoque redirects rather than refutes. It exploits the psychological power of fairness intuitions to evade a substantive challenge. The fact that someone is a hypocrite is a comment about their character, not a logical refutation of their argument. The claim they made needs to be evaluated on its own merits — which means looking at the argument, not the arguer.
See also: Ad Hominem, Burden of Proof, Bulverism
Sources & Further Reading
- Walton, Douglas. Ad Hominem Arguments. University of Alabama Press, 1998.
- Wikipedia: Tu quoque
- Internet Encyclopedia of Philosophy: Fallacies
- Critikid: Tu quoque fallacy