My beliefs would be more on the lines of Phenomenological/personal reality. I believe in some concepts/theories and I validate it with my experiments. Even me doubting my own experiment is a reality. My need for seeking more is a reality experienced both as physical sensations and in the mental plane as momentum and direction of thoughts. Even if I think about happiness as a concept and feel good, I consider that a valid experience. I first compartmentalize and then try to integrate everything.