Grice e Boezio

 

1. Aristotle regarded types of soul (as I would suppose, of living thing) as forming a "developing series". I interpret that idea as being the supposition that the psychological theory for a given type is an extension of, and includes, the psychological theory of its predecessor-type. The realization of this idea is at least made possible by the assumption that psychological laws may be of a ceteris paribus form, and so can be modified without emendation. If this aspect of the programme can be made good, we may hope to safeguard the unity of psychological concepts in their application to animals and to human beings. Though (as Wittgenstein noted) certain animals can only expect such items as food, while men can expect a drought next summer, we can (if we wish) regard the concept of expectation as being determined not by the laws relating to it which are found in a single psychological theory, but by the sequences of sets of laws relating to it which are found in an ascending succession of psychological theories.