We don't know reality directly. We appear to know our sensory-cognitive-affective model of reality as it appears to be generated by the brain. One is considered psychotic if one perceives things, not perceived by others.
Are you familiar with the concept of Maya in Hinduism? Maya means illusion and states that this perceptual world that is sensed by our senses and measured by science is an illusion i.e. not what it seems. It is impossible to disprove it. This is why I am a strong agnostic about the ultimate nature of reality although I am not agnostic about the apparent nature of reality.
Does the workings of the brain produce the mind or is the brain an illusion perceived by an immortal soul? How would I know for sure? How would you or anyone else know for sure? Do any of you really exist or are you all part of a dream or a hallucination I am experiencing?
