The difficulties in the way of a thoroughgoing cerebralism are logical: they rest on the difficulty of modeling something that displays remote intentionality in a medium that only displays fully actual. descriptive structures, and in modeling high-level universality, and, more importantly, the everlasting, open retreat to ever higher levels of universality, in a medium that cannot reflect all the higher-level affinities and logical properties that are thus implicated.
(Psyche and Cerebrum, Marquette University, 1972), pp. 24-5