ABSTRACT
It is now time to descend to the level of the pavement. In Part One the description of the system of perception included reference to two problems inherent in the system. The first concerned subliminal perception and suggested how the mental equivalent of the homeostatic principle desires maximum correspondence between external phenomena and internal models. In this way perception and behaviour can take place with minimum awareness, leaving response and executive control to the primitive perceptual system. Under these circumstances response may be conditioned by primitive criteria.
