Deliberation is a process of thoughtfully weighing options before making a decision. Yet in order , to choose among the available options, we have to agree on the options available to us, and theןr the outcomes. But many times often, we find ourselves in disagreement disagree about the options or the ways how the world behavebehaves. These disagreements are the results of result from differences in our understanding of how the world works. So in order , to be able to understand better understand why we perceive the world differently, I suggest we have to understand how our knowledge is built, and why it is different from person to person. This Page will try to explain how knowledge is built and why we perceive the world differently.

To explain knowledge, I will suggest that knowledge is a thing that is being used to understand, explain, predict , and manipulate the inputs that come from the senses.

Those inputs that come from our senses, whether outer senses like smell, vision, hearing, touch, warmth, etc. , or from our inner senses like thirst, hunger, love, hate, etc are ., will all will be called the phenomena. Phenomena, with in correspondence to Kant's philosophy, is are our senses sense's experiences.

Through the usage of knowledge, we We try to understand our surroundings and inner feelingsthrough knowledge, but we have an unobservable barrier to the surrounding our surroundings or even our inner selves. We have no access to the surrounding itselfsurroundings. All our knowledge about the "surroundingsurroundings" comes from our senses. We have phenomena, but no access to the thing that creates the experiences. For more than 2500 years of epistemology, [[The Historircal overview of the phenomenological cage|nobody had found a reliable way to establish a relationship between perception and the “surrounding”]]. To demonstrate the problem of the relations between knowledge and the surroundingsurroundings, 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 exist as you perceive it, or if you are actually a brain in a vat, which gets its sensory inputs from a computer, that simulate simulates the perceived world.

Till today nobody was able Therefore, I'll try to find a reliable answer set some axioms that will enable us to this question. Philosophers sometimes suggest that Hillary Putnaham had found a way, but his conclusions say otherwise. He concluded that understand what knowledge is and how we cannot distinguish between reality and virtual experience<ref>Putnam, H. (1981): should treat it in relation to the "Brains in a vatthings" in Reason, Truth, and History, Cambridge University Press; reprinted in DeRose and Warfield, editors (1999): Skepticism: A Contemporary Reader, Oxford UP</ref>we observe.

Therefore, we have to set for now an axiom that says:  :“''We do not know the relation between our knowledge and the inner or outer-world'axiom 1''”. Or in Kant's methodology, we cannot know the noumenon. The : We can only thing we can say is that we perceive. How I will suggest how this perception is constructed, I will suggest later own in this paper. as As a result of our inability to go beiond beyond our perceptions, I will call this principle '"The phenomenological cage principle'''