@igm,
That feeling of confidence is what some people call belief. In my mind, "confidence" reflects better the kind of flexibility I imagine such a conceptual frame should have, but that's me. I have no real issue with the word belief, though I find it strange how for some reason certain beliefs should have any kind of immunity to scrutiny.
If I believe that everyone who is shorter than a set height by the age of twenty, should be put into labor camps and used as slaves by the rest of us, I might be able to enforce that through popularity. If there are enough people above the set height limit who go along with my belief, things might start happening.
Then, a few hundred years later, some fellow comes along with a reasonable amount of 'confidence' in economics (my "enslave short people based" one) with some reservations and a hope that the worst mistakes of recent times would not be repeated unless unavoidable... would that be a belief?
Makes it a bit harder to answer that question.