Is it your contention that a tiger may be the same thing as a brain state?
It would seem to me that any coherent philosophy of mind must accept their being different as a datum; or conversely, any that implied their not being different would have to be false.
EDIT: my position has been held -- even taken as axiomatic -- by the vast majority of philosophers, from the pre-Socratics onwards, and into the 20th century. So it's not some idiosyncratic minority position.
It would seem to me that any coherent philosophy of mind must accept their being different as a datum; or conversely, any that implied their not being different would have to be false.
EDIT: my position has been held -- even taken as axiomatic -- by the vast majority of philosophers, from the pre-Socratics onwards, and into the 20th century. So it's not some idiosyncratic minority position.