wrong assumption
Mistaken belief held
A wrong assumption is a belief taken as true without verification that turns out to be false.
The phrase emphasizes that the error lies not in reasoning but in the premise itself: The whole plan was based on a wrong assumption about customer demand.
Often appears in postmortems explaining how things went awry: We made the wrong assumption that everyone had internet access.
- mistakenIncorrectly understood or believed
- falseNot matching reality
- false premiseUntrue foundational assumption
- errorFault in communication
- misconceptionErroneous belief or understanding
fallacy · logical fallacy · flawed · misguided · faulty · cognitive bias · bias · blind spot · oversight · jumping to conclusions · leap · hasty · prejudice · misjudgment · presume · jumped · taken for granted · unfounded
- misjudgmentsmisjudgment, mistake, error, blunder, miscalculation
- comic mishapsmistaken identity, misunderstanding, mix-up, miscommunication, blunder
- red herringsdecoy, misdirection, wild goose chase, smokescreen, false trail
- human flawsmistake, error, flaw, fault, failing
- mental lapseslapse, forget, slip, misplace, overlook
- miscommunicationmix-up, mixed signals, confusion, mixed messages, crossed wires