The only real confusing bit about stuff like this is it all comes down to the definition. What meaning is right? I dunno but if it's this one:
2. A preconceived preference or idea.

Then it's gonna be biologial. Everything that uses logic is gonne have a prejuditial (sp??) opinion on a situion that seems familliar. Obviously we don't know the future, but we can get a good idea of what is most probable to happen based on what we allready know.

Then again, I have no idea. So don't listen to anything I say