Tu Quoque

Definition

Tu quoque ('you too') deflects criticism by pointing out that the accuser is guilty of the same or similar behavior. While it may reveal hypocrisy, it does not actually address whether the original criticism is valid. The behavior in question remains wrong regardless of whether the critic also engages in it. It is a specific form of ad hominem that weaponizes consistency expectations.

Formal Logic Pattern

FOL Pattern

The First-Order Logic formula representing this reasoning pattern's logical structure.

FOL (First-Order Logic) uses quantifiers (∀ = for all, ∃ = there exists), connectives (∧ = and, ∨ = or, ⇒ = implies, ¬ = not), and predicates to capture the essential form of a reasoning pattern. For example, the Ad Hominem fallacy: Person(x) ∧ HasFlaw(x) ⇒ Invalid(Claim(x)). These patterns allow automated verification of logical validity.

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Does(x, ¬P) ⇒ Invalid(Asserts(x, P))

Formal Verification: Not formally decidable

Verification Steps

Verification Steps

Binary yes/no questions that an AI must answer to detect a reasoning pattern in a text.

Each of the 452 aspects has verification steps — simple yes/no questions designed to systematically detect whether a pattern appears in a text. For ad hominem: "Does the argument attack a person rather than their claim?" For false dichotomy: "Are only two options presented when more exist?" This ensures consistent, reproducible analysis.

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Binary (yes/no) questions an LLM must answer to identify this aspect:

1

Does the response point to the opponent's inconsistent behavior?
Type: binary
2

Is the opponent's hypocrisy used to dismiss their argument?
Type: binary
3

Does the response fail to address the original argument on its merits?
Type: binary

Description

Tu quoque ('you too') deflects criticism by pointing out that the accuser is guilty of the same or similar behavior. While it may reveal hypocrisy, it does not actually address whether the original criticism is valid. The behavior in question remains wrong regardless of whether the critic also engages in it. It is a specific form of ad hominem that weaponizes consistency expectations.

Why It Works

Hypocrisy triggers a strong sense of unfairness, making audiences sympathize with the accused. It also shifts the burden from defending one's behavior to defending one's right to criticize.

How to Counter

Acknowledge the hypocrisy if it exists, then redirect: 'Whether or not I follow my own advice doesn't change whether the advice is correct. Let's focus on the substance.'

Also Known As

Appeal to Hypocrisy Whataboutism Two Wrongs Make a Right

Real-World Context

Extremely common in geopolitics ('whataboutism' was a signature Soviet tactic) and in personal relationships where partners deflect complaints by counter-accusing.

Related Aspects

Ad Hominem Bulverism Fallacy of Relative Privation Guilt by Association

Related Aspects

← correlates with

Whataboutism

Deflecting criticism by pointing to a different issue ('But what about X?').

← related to

Fallacy Fallacy

The fallacy fallacy (also known as the argument from fallacy) occurs when someone concludes that a claim is false merely because an argument supporting it contains a logical fallacy. While identifying fallacious reasoning is valuable, a bad argument for a true claim does not make the claim false — the conclusion may still be correct, just not for the reasons given. The truth value of a proposition is independent of any particular argument for or against it.