ABSTRACT
In the 1970s, two philosophers looked at the evidence from split-brain patients and came to diametrically opposite conclusions. One philosopher reviewed the evidence from split-brain patients and concluded that we cannot tell how many minds they have. Another philosopher looked at the same evidence and concluded that split-brain patients have two minds. The existence of two minds, conflicts with the "highly integrated character of the patients' relations with the world in ordinary circumstances". The evidence from both split-brain and intact brain individuals is that the ability to express the thoughts in language is a feature of the left hemisphere mind. But the ability to use language to construct complex thoughts is not an essential component of a mind. Some philosophers speak of persons as subjects of experience, and judge experience by the ability to report the experiences linguistically.
