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I agree that reality is always a hypothesis. I don't think anyone can ever know for sure what reality is and whether one "true reality" really exists. Everyone is different and has a different I-function so everyone must experience different realities. How can anyone say they are truly seeing the same picture as another person even when these two people are looking from the same view?  I may agree with another person that an object is blue, but I will never truly know if what that person is really seeing is what I too think is blue because I only see what I can see and not what others see. What if it was possible that what I see as blue is what another person sees as what I believe to be red and that person only agrees that the object is blue because she's been taught that the color on the object is blue (but really if I were looking through that person's eyes, I would see red). These speculations lead me to agree that what I perceive as reality actually is a construction of the nervous system then. This is still not to say that one true reality does not exist, however. 

Like this question of reality, it is hard to tell what the world would look like if we were to eliminate all constructions. Again, how can we ever know if we only sense what we experience?

This leads me to the question of whether everything the majority of people say that is not real, such as dreams, ghosts, magic, imaginary friends, etc., could possibly be real. It could be real and we just call it imagination. Maybe we just need to fix the definition of imagination. 

 This is getting really trippy....