When talking The first question I want to address, is why most of us have different perceptions about the world. Why it is hard to agree on things. I'll propose that if we will undestand how knowledgeis constucted in the brain, we mean, will have more understanding in the question. Knowledge is our understanding and predicting the behavior of the world within us and around us. For Each and every one of has have unique perception. How this perception is created and how it realte to the “real world” is the quest that epistemology has set before herself. Yet for more then 2500 years of epistemology, nobody had found a reliable way to know establish the relations of perception or knowing about the inner and outer world “real world” (Link to the history...). To summarize thus demonstrate the problem of knowledge, we can may use the “brain in a vat” (Link to wikipedia) thought experiment. In this thought experiment, you are asked to find a reliable way to know if you realy really exists as you perceive it, or you are really actually a brain in a vat, which gets it's sensory inputs from a computer, that simulate the perceived world. This goes to the question of how do you know you are not part of the matrix, as was asked in the movie “The Matrix”.

The Till today nobody was able to find a reliable answer is therefore, we can'tto this question. People sometime suggest that hillary putnaham Hillary Putnaham had found a way, but her conclusions say otherwise. (ref) she conclude that we can not destinguish distinguish between realty and virtual experience. Therefore, we have to set this as an axiom in our way to search for knowledge: “''We can not have any knowledge about the inner or outer-world''”. Or in Kant's methodology, we will never know the noumenon.

The only thing Therefore, we have to set for now an axiom that says: “''We can say is that not have any knowledge about the inner or outer-world''”. Or in Kant's methodology, we observe will never know the noumenon.