“most common form of type-B materialism holds that phenomenal states can be identified with certain physical or functional states”. (14)
the taste of mild = a certain physical or functional state.
H2 O = water
DNA = genes
consciousness = functional/physical states, etc.
“a complete physical description of the world, Mary would be able to deduce all the relevant truths about water and about genes by deducing which systems have the appropriate structure and function”. (14)
“we cannot coherently conceive of a world physically identical to our own, in which there is no water, or in which there are no genes”. (14)
“he argues that ‘water is H2 O’ is necessary – true in all possible worlds but not knowable a priori”. (16)
necessarily water = H2 O