  William as usual offers a large number of objections to these theories. He attacks as inappropriate the analogies with light or the sun, and argues that the theory of the agent and material intellects is incompatible with the simplicity of the soul, as it posits these intellects as two distinct parts of the soul, one active and one receptive. In the case of both the agent intellect and the agent intelligence, he argues that their proponents will be forced to hold the absurd result that human beings know everything that is naturally knowable, whereas in fact we must study and learn and observe in order to acquire much of our knowledge.