Phenomenal includes everything originating from personal experience, while Noumenal includes everything except personal experience; something is Ontological when it includes both.
The ability to separate phenomenal from noumenal is similar to separating personal from objective, so the term 'not objective' is close. Delusional is also close because it is not conscious/intentional, but it refers to something that is false despite evidence to the contrary according to Merriam Webster, as opposed to not even recognizing there is anything besides what you believe is true. Narcissistic and Egocentric are some more words that come close, but they are focused more on self, not the inability to recognize there's more to reality than one's self. What I'm searching for is a word or term that describes the inability to recognize the difference between phenomenal and noumenal...the inability to even recognize what 'objective' is, much less 'be objective.'
My instincts go to words like stupid, immature, foolish or self-absorbed...surely I can do better than that, with your help. Thanks.