On brain mind and computer a hypothesis

That human beings are rational is a truism; the ability to reason formally and in an abstract manner seems to be completely lacking in all other living beings. There are certainly many other human capabilities, but the ability which most marks an individual out as truly human is this ability to think, deliberate upon, analyse and categorize facts, formulate ideas, and decide on a course of action. These are truly the results of a developed mind.
Before the advent of modern science there was a clear demarcation between the mind and the brain. This distinction has become blurred with the passage of time. But the study of the brain as a neural machine and the development of computers as automata have enabled us to make equally bold statements about both - about what could possibly be done by them and what limits are impossible for them to overstep.
Vedantic thinkers classify mental functions into four basic categories: samkalpa-vikalpa (cogitation, in the mode of manas), niscaya (ascertainment or determination, in the buddhi mode), ahamkara (ego), and smrti (memory as chitta). Thus, apart from the faculty of thought, the mind is supposed to have a sense of identity, an ego or I-sense. Furthermore, it has the capacity for introspection, which computers are said not to have. In the case of the brain it is difficult to say whether it is able to introspect or not.artificial-intelligence community finds the ability of one part of the brain to observe the thought processes of the rest can be termed introspection. Moreover, at most times, this ability manifests itself not as true self-observation from a detached (or outsider's)standpoint but as a sort of recollection of the past or as planning for the future.
Brain, in contrast to mind, is easier to explain. It is aliving mass of neurons, interconnected by its many dendrites, passing signals from one nerve to the other all the time. Of course, believers in holistic science argue that the brain when taken as a "whole" becomes something else, that it is more than the sum total of its neurons.

Brain vs computer:Whereas the human brain has got billions of neurons, each neuron has only a very basic processing power. Thus a brain can be thought of as a multiprocessor parallel computer where each processor is only capable of only few rudimentary operations, like checking if some signal is received or not. An average computer, on the other hand, consists of a single but powerful processing unit capacle of doing hundreds of thousands of arithmetic computations in a fraction of a second.

So will brain be replaced by an intelligent computer only time explains when..........