Logical behaveiorism tries to describe what we mean when we talk of an individual"s thoughts, beliefs, intenions, dreams, and sensaions. The atack on the ghost in the machine . Ryle is deeply confused the natural picture: common sense is commited to the idea that mental states are inner causes of behavior. Example: why joe lited the cup to his lips. Common sense answer might be that he did this because he wanted a drink of water and believed that there was water in the cup. We can see the behavior but don"t see the beliefs and desires that cause it. The belief and desires are inside; they can"t be directly observed by third paries, through their efects- behavior- can be. If mental states were inner, then the mental states of others would be hidden from us. Each of us would be able to observe the behaviors of others, but not the beliefs and desires that others have.