According to Ned Block, functionalism is concerned with finding the answer to the question ("what are mental states?"), ("What are mental states?"). One of the characteristics of functionalism is that it sees any form of mental state as one that includes the tendency to behave in particular ways as well as possessing particular mental states. Functionalists are usually concerned with the individuation of mental states, partly on the basis of causal relations with others. As Shoemaker explains, in his 1975 work, functionalism, from the perspective of philosophy of mind, is the belief that psychological terms or mental can be eliminated to some extent. Functionalists are known to treat mental state terms as a functional characterization of the mental state that differs from input and output terms. Thus in a ("simplified version of the Turing machine") the mental states are associated with the states of the Turing machine, which in themselves are clearly defined by. a machine table that mentions achievements and outcomes that are explored in a non-mentalistic manner. Furthermore, functionalism emphasizes that the characterization of mental states should include descriptions of outputs and inputs in both the non-machine and machine versions. The variation between psychofunctionalism and functionalism brings forward a difference in the specification of outputs and inputs. Functionalists limit themselves to the specification of the outputs and inputs that constitute common-sense knowledge; Psychofunctionalists are not bound by such restrictions. While both sides place emphasis on the outputs and inputs of physical specifications, functionalists are keen on externally observable classifications. Psychofunctio...... half of the document ......the process of counting the impulses of neurons to provide inputs and outputs helps to avoid the dilemma just sketched, because the brain contained in the bottle and the paralytics would bear the right impulses of neurons, even if without bodily movements. However, one would argue that there is a possible paralysis that affects the body's nervous system and can therefore influence neural impulses. Psychofunctionalism therefore presents the same problem presented by functionalism. A valid answer would be: diseases of the nervous system have the potential to change the mentality, for example they cause the victim to never suffer from the sensation of pain. Therefore, there is a probability of reliability in finding that a widespread disease of the nervous system that caused intermittent paralysis made people incapable of various mental lists.