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→The phenomenological cage
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 knowledge is constucted in the brain, we will have more understanding on how to solve this question.
Knowledge is our ability to predict the behavior of the world as we perceived it. Each and every one of us have different prediction predictions about the world. How this perception is created and how it realte to the “real world” is the quest epistemology has set before herself.
Yet for more then 2500 years of epistemology, [[The Historircal overview of the phenomenological cage|nobody had found a reliable way to establish the relations of perception or knowing about the “real world”]]. To demonstrate the problem of knowledge, we may use the thought experiment of the “[http://en.wikipedia.org/wiki/Brain_in_a_vat brain in a vat]”. In this thought experiment, you are asked to find a reliable way to know if you really exists as you perceive it, or you are actually a brain in a vat, which gets it's sensory inputs from a computer, that simulate the perceived world.