There has always been a division among "thinkers", ponderers, Philosophers, and Imagineers along two distinct lines:
1. Reality is what we 'think' it is (or worse: into being).
2. Reality exists whether we encounter it, acknowledge it, or not.
Is it Primacy of Consciousness? The primacy of Existence?
"Delusion is the inability or unwillingness fully to grasp the difference between one’s inner state and the outer world".