fallacy – a mistaken belief, especially one based on unsound arguments
(Pronounced fa-luh-see)
To remember the definition of the word fallacy, use the following mnemonic:
A falcon and a seagull (fallacy) shared the mistaken belief that they were brothers.
Examples of fallacy in a sentence
She'd fallen for the fallacy the money would bring her joy.
He aggressively supported the fallacy that the Earth is flat.
They realised their entire lives were based on a fallacy.