z góry wyrobiony osąd in inglese:

I had the same preconceptions about life in South Africa that many people have.

Leave your preconceptions at the door

He allowed his preconceptions about other cultures to prevent him from travelling.

What are other words for preconception? Prejudice, prepossession, bias, preconceived idea, preconceived notion, presumption, prejudgment.

Art is meant to challenge preconceptions.