TheaetetusPlatoRead freeBuy on AmazonAppears in 6 ideasMetaphysicsQualityAre the qualities we perceive in things real properties of nature, or projections of the mind?EpistemologyKnowledgeWhat can we know, and how do we come to know it?JudgmentWhat is it for the mind to affirm or deny, and how do we distinguish sound judgment from error?SenseWhat do the senses contribute to knowledge, and where do they fall short?Logic & MethodDefinitionDoes a definition state the nature of a thing, the meaning of a word, or merely the purpose for which we classify it?Universal and ParticularDo universals exist independently of particular things, or are they only names we apply to collections of similar individuals?