błędne mniemanie Englisch:

This idea is a common misconception

It's a common misconception that older workers cannot learn to use new technology.

It's a misconception that bats can't see.

We hope our work will help to change popular misconceptions about disabled people; I'd like to clear up the common misconception that older workers don't know how to use technology; It’s a common misconception that Americans think only about money.

A common misconception about Christopher Columbus is that he once impressed a tribe of natives by predicting the lunar eclipse. The truth of the matter is that he CAUSED it.