'Inner states'

Not too long ago, psychological concepts such as 'believe', 'intend', 'hope', were considered outside the sphere of interest of Scientific Materialism. The task of bringing such concepts under the fold of a 'unified scientific discourse' was relegated to Logical- Behaviourism, so materialists occupied themselves with 'after- images', 'itches', and 'pains'.
This is no longer so. Scientific Materialism has come of age. Those who espouse it attempt now to provide an account embracing all psychological concepts.
Of course, the idea that all psychological phenomena are merely certain brain states and processes is not entirely new. But lately, particularly as a result of D. M. Armstrong's attempts to lay a foundation for what he calls 'Central-State Materialism', this idea has received a new, extensive, and very forceful exposition.