Belief. You’d think there wasn’t another word out there. Frankly, I rarely use it.
lol
Belief: trust, faith, or confidence in someone or something.
Perhaps 
it’s @Sherlock-Holmes opinion that when we state we have no confidence in unevidenced claims, it’s an “ideology”?
Perhaps addition synonyms to belief ( Synonyms: faith, principles, doctrine, ideology More Synonyms of belief
it’s @Sherlock-Holmes belief that when we state we have no belief in unevidenced claims, it’s a “belief”.