The mind is a general term for the way a person thinks, reasons, perceives, wills, has ideas, and has emotion. For science, what others call the mind is "entirely" caused by workings of the brain. The philosopher Gilbert Ryle called mind the "Ghost in the Machine". He said the idea that it was separate from the brain was the mistaken "Official Doctrine". However, some think that mind is separate from the body and is called a soul (see dualism).