The phrase "not even wrong" describes a purported scientific statement that is not sufficiently well-defined or testable to be judged true or false.
The expression is generally attributed to physicist Wolfgang Pauli. Peierls (1960) records an instance in which Pauli used it when asked to assess a young physicist's paper suspected of having little value. Woit (2005) notes that several versions of the story circulate and identifies Peierls's memoir as the best published source.
Peter Woit adopted Not Even Wrong as the title of his blog on mathematics and theoretical physics (Woit 2005).
