Churchland from the identity theory dubious. Why?

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Churchland finds the identity theory dubious primarily because of the skepticism regarding a perfect one-to-one correspondence between the concepts and entities of folk psychology (our everyday psychological language and understanding) and the detailed, often complex findings of neuroscience. This skepticism stems from the observation that the way we talk about mental states and processes in everyday language does not seem to map neatly onto the brain's physical structures and functions as uncovered by scientific research.

Churchland from the Identity Theory Dubious. Why