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If intelligent thinking is a process to plan and support the execution of any independent act, it should begin and end within the present dimension of time. It should have capability to produce unpredictable results without the influence of past. But, the present is completely dependent on the latest segment of the past. It may be the end of past and the beginning of future. The real time period of present (almost of zero dimensions) is not enough to accommodate any comprehensible complete act that we seem to be performing by our thinking system alone. But, we do feel our presence and the existence of a universe around us. To feel something can also be considered as an act in the real time and space. The act of feeling is a process that can be performed in the minimum time of almost zero dimensions. This too will prove to be a reality only if we are sure of the reality of our feeling process. But, even if we are lost in the darkness, far away from the reality, we do exist to perceive the unreality. To perceive unreality can also be considered to be an act that should need a time for its process of happening. To sense an unreality from within us is an act that should require the minimum conceivable real time period. Thus, we can't do any thing on our own in the present dimension of time except sensing the reality or manipulating some unreality.