Functionalism tries to explain the connection between the mind and the body, ie it deals with the so-called mind-body problem. The simplest form of functionalism can be described by a Turing machine that functions on the basis of the table by input and output. Turing's machine is also connected through inputs and outputs with artificial intelligence. The chief representatives of functionalism are Hilary Putnam and Jerry Fodor. In addition, many philosophers have dealt with the problem of mental and physical, and emphasized that consciousness and feelings are actually brain processes. The emphasis is on the fact that mental states can be identified with physical states. Also, some philosophers have argued against functionalism. Objections were raised regarding the Turing machine, or its very principle of work. These philosophers believe that mental states can not be compared or identified with physical states because the mental state of the machine would actually be abstract and thus unusable.