Rolls's preliminary definitions of emotion and speculative restriction of c
onsciousness, including emotional sentience, to humans, display behaviorist
prejudice. Reinforcement and causation are not by themselves sufficient co
nceptual resources to define either emotion or the directedness of thought
and. motivated action. For any adequate definition of emotion or delimitati
on of consciousness. nem physiology, such as Rolls is contributing to, and
also the resources of other fields, will be required.