What's the word for when a person chooses to believe something based on preconceptions rather than judging it objectively?

Here's an example (a little contrived but hopefully illustrates the point):

A person ,P, is usually very healthy and prides themself on eating good, healthy food. This person has two friends, A and B, and they share a house.

P is in awe of A and pretty much anything A does is "right". For example, if A buys a drink that's packed with sugar but looks "healthy" then they decide this drink is super-healthy and there's now always a carton of this drink on P's shelf in the fridge.

However, they're not so keen on B. B buys some food that's super-healthy. P doesn't even bother tasting this food and it never gets touched, despite being on the sharing shelf.

  • I think "prejudice" might apply. Also, "hero worship".
    – Hot Licks
    Aug 29, 2016 at 12:14

3 Answers 3


It's almost in your title.


ADJECTIVE (Of an idea or opinion) formed before having the evidence for its truth or usefulness: the same set of facts can be tailored to fit any preconceived belief


I think you are looking for prejudice:

  • any preconceived opinion or feeling, either favorable or unfavorable.



Biased is the word that comes to my mind when a person is not objective.

From your example, person P is unfair in treating person B's food even though B's food is super healthy. So P is biased towards person A's choices.

Cambridge dictionary defines biased as,

Showing an unreasonable like or dislike for a person based on personal opinions.

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