fallacy

Từ điển Oxford Advanced Learner 8th

fal·lacy [fallacy fallacies] BrE [ˈfæləsi] NAmE [ˈfæləsi] noun (pl. fal·lacies)
1. countable a false idea that many people believe is true
•It is a fallacy to say that the camera never lies.
2. uncountable, countable a false way of thinking about sth
•He detected the fallacy of her argument.
see also ↑pathetic fallacy

Word Origin:
late 15th cent. (in the sense ‘deception, guile’; gradually superseding Middle English fallace): from Latin fallacia, from fallax, fallac- ‘deceiving’, from fallere ‘deceive’.

Example Bank:
•It's a fallacy to say that the camera never lies.
•The idea that all women want children is a common fallacy.
•There's a widespread fallacy that longer working hours mean increased productivity.