Beginning of Essay
Aristotle refutes Plato's Theory of Ideas on three basic grounds: that the existence of Ideas contradicts itself by denying the possibility of negations; that his illustrations of Ideas are merely empty metaphors; and that they theory uses impermanent abstraction ....

Middle of Essay
.... the processes of nature were valid entities. However, Aristotle attacks this theory on the grounds that Plato's arguments are inconclusive either his assertions are not al all cogent. Aristotle says, or his arguments lead to contradictory conclusions. For example, Aristotle claims that Plato's arguments lead one to conclude that entities (such as anything man-made) and negations of concrete ideas could exist - such as "non-good" in opposition to good. This contradicts Plato's own belief that only natural objects could serve as standards of knowledge. Also, Aristotle refutes Plato's belief that Ideas are perfect entities unto themselves, independen ....