Ryle rejects
Descartes' theory of the relation between mind and body, on the grounds that it approaches the investigation of mental processes as if they could be isolated from physical processes. In order to demonstrate how this theory may be misleading, he explains that knowing how to perform an act skillfully may not only be a matter of being able to reason practically but may also be a matter of being able to put practical reasoning into action. Practical actions may not necessarily be produced by highly theoretical reasoning or by complex sequences of intellectual operations. The meaning of actions may not be explained by making inferences about hidden mental processes, but it may be explained by examining the rules that govern those actions. According to Ryle, mental processes are merely intelligent acts. There are no mental processes that are distinct from intelligent acts. The operations of the mind are not merely represented by intelligent acts, they are the same as those intelligent acts. Thus, acts of learning, remembering, imagining, knowing, or willing are not merely clues to hidden mental processes or to complex sequences of intellectual operations, they are the way in which those mental processes or intellectual operations are defined. Logical propositions are not merely clues to modes of reasoning, they are those modes of reasoning. The
rationalist theory that there is a
transformation into physical acts of some purely mental faculty of "Will" or "Volition" is therefore a misconception because it mistakenly assumes that a mental act could be and is distinct from a physical act, or even that a mental
world could be and is distinct from the physical world. This theory of the separability of mind and body is described by Ryle as "the dogma of the ghost in the machine." He explains that the workings of the mind as it governs the body are neither an independent nor a distinct mechanism, that there is no entity called "Mind" inside a mechanical apparatus called "the body", but that the workings of the mind may be better conceptualized as the actions of the body. Cartesian theory holds that mental acts determine physical acts and that volitional acts of the body must be caused by volitional acts of the mind. This theory, according to Ryle, is "the myth of the ghost in the machine." There
is no contradiction between saying that an action is governed by physical laws and saying that the same action is governed by principles of reasoning. The motives of observable actions are
propensities and
dispositions; these explain why behaviors occur, and not some purely mental process. For example, the disposition to want or not to want something is not explained by an intellectual motive for that thing. The disposition to want something is explained by
the behaviors that are involved in wanting that thing. Thus, the mind does consist of abilities and dispositions that do explain behaviors, for example the learning, remembering, knowing, feeling, or willing behaviors. However, personal abilities and dispositions are not the same as mental processes or events. To refer to abilities or dispositions as if they were purely mental occurrences is to make a basic kind of category mistake. The nature of a person's motives may be defined by the actions and reactions of that person in various circumstances or situations. The nature of a person's motives in a particular situation may not necessarily be determined by any hidden mental processes or intellectual acts within that person. Motives may be revealed or explained by a person's behavior in a situation. Ryle criticizes the theory that the mind is a place where mental images are apprehended, perceived, or remembered. Sensations, thoughts, and feelings do not belong to a mental world which is distinct from the physical world. Knowledge, memory, imagination, and other abilities or dispositions do not reside "within" the mind as if the mind were a space in which these dispositions could be placed or located. Furthermore, dispositions are not the same as behavioral actions, but actions may be explained by dispositions. Dispositions are neither visible nor hidden, because they are not in the same logical category as behavioral actions. Dispositions are not mental processes or intellectual acts, they are propensities which explain various modes of behavior. Perceptions, thoughts, emotions, and feelings may be understood as observable behaviors which have various modes of production. Ryle admits that his approach to the theory of mind is behavioristic in being opposed to the theory that there are hidden mental processes that are distinct from observable behaviors. His approach is based on the view that actions such as thinking, remembering, feeling, and willing are revealed by modes of behavior or by dispositions to modes of behavior. At the same time, however, he criticizes both Cartesian theory and behaviorist theory for being overly mechanistic. While Cartesian theory may insist that hidden mental events produce the behavioral responses of the conscious individual, behaviorism may insist that stimulus-response mechanisms produce the behavioral responses of the conscious individual. Ryle concludes that both Cartesian theory and behaviorist theory may be too rigid and mechanistic to provide us with an adequate understanding of the concept of mind. == Category mistakes ==