In the nature of the case satisfactory conclusions as to the rationality which may be predicated of animals are impossible.
Moreover we can make a history of Aristotle's thought and gradual composition thus: (s) Earlier acceptance in the De Interpretatione of Plato's grammatical analysis of the sentence into noun and verb (secundi adjacentis) but gradually disengaging the proposition, and after wards introducing the verb of being as a third thing added (tertium adjacens) to the predicated verb, for the purpose of opposition.
The first, De Sancta Trinitate, is addressed to Symmachus (Domino Patri Symmacho), and the result of the short discussion, which is of an abstract nature, and deals partly with the ten categories, is that unity is predicated absolutely, or, in regard to the substance of the Deity, trinity is predicated relatively.
A genus, they said, is essentially something which is predicated of a subject; but a thing cannot be a predicate (res enim non praedicatur).
But freights had come down by 1900 to half the rates predicated by Caird; indeed, during a portion of the interval they ruled very close to zero, as far as steamer freights from America were concerned.