Any constructed thoughts that serve to ignore, acknowledge, or rationalize one way or another fall under belief systems.
be·lief (bĭ-lēf')
n.
1. The mental act, condition, or habit of placing trust or confidence in another: My belief in you is as strong as ever.
2. Mental acceptance of and conviction in the truth, actuality, or validity of something: His explanation of what happened defies belief. 3. Something believed or accepted as true, especially a particular tenet or a body of tenets accepted by a group of persons.