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There appears to be a special system in our body that correlates the realities to some predefined perceptions to simplify our comprehension process. We are programmed to feel and believe some realities in a unique way. Things that we observe may not necessarily be in the form of our actual comprehension. It was very difficult to make people believe that the Sun is not circulating our Earth. Similarly many things that appear to be real are so because of our wrong perceptions.

There is one more very important parameter that is always associated with every activity. It is "time". If any thing exist, it needs to be available within certain real time period. That is, it should be physically available in the present time so that we can sense it by our sensory system or can detect its effects by scientific means. The time can be divided in three main segment blocks namely past, present and future. If we wish to perform any meaningful action by our thinking system, to induce or try to induce any physical changes in or around us, we will be required to act in the present time only. But how exactly we can draw the boundaries between past, present and future is not so simple since any minute present time dimension can be further sliced to still smaller segments of past, present and future. That is, any present hour of time is a representation of present minute along with 59 minutes from past and future. And similar is the case with a minute or a second and so on. In a broader sense, we don't have any present that can be represented by certain time period. It seems to be non existent. But, at the same time, during slicing of the minimum segment of present time period, even after doing the slicing act indefinitely, the present will remain existent. It will not be a zero state but just a zero state.