The clue "Mistaken idea" last appeared in the Wall Street Journal crossword on April 13, 2019. The correct answer for this puzzle is "FALLACY", a 7-letter word.
Solution FALLACY is 7 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is FALLACY with 7 letters, and the shortest is FALLACY with 7 letters.
Indeed, the puzzle clue "MISTAKEN IDEA" has seen a surge in lookups recently (last checked: 16 Jan 2026). Apparently it´s giving players some headaches!
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The solution is 7 letters long.