Whataboutism deflects a criticism by raising a different wrongdoing, usually by the accuser or someone associated with them. The original charge is neither answered nor denied; the conversation simply moves.
It is a specific form of tu quoque, and it survives because the counter-charge is often true — which makes it feel like a contribution rather than an evasion.
“Your department missed its deadline three times this quarter.”
“What about marketing? They have missed every deadline this year.”
Marketing may well be worse. The three missed deadlines are still missed.
The name comes from Cold War press coverage, where criticism of the Soviet Union was routinely met with a counter-example from the United States. The structure long predates the label.
Whataboutism is worth separating from a legitimate consistency challenge, because they look identical and only one is a fallacy. Pointing out that a standard is being applied selectively is a real argument: if a critic excuses the same conduct elsewhere, that is relevant to how much weight their judgement deserves.
The fallacy is the substitution. A consistency challenge adds to the discussion — the original charge still stands and now so does a second one. Whataboutism replaces the discussion, and the test is simply whether the original point is still on the table afterwards.
It is effective for a reason that has nothing to do with logic: answering it requires either conceding the counter-charge, which feels like losing, or defending something you may not want to defend, which moves the argument onto ground you did not choose. The only reply that holds is to grant it and return — yes, and that is also a problem; this one is still ours.