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the branch of philosophy that deals with first principles and explain the nature of being or reality (ontology) and of the origin and structure of the universe (cosmology). Answers the question "What is the nature of reality?"
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It is a branch of philosophy that defined as the study of knowledge. It answers the question "What is the nature of Knowledge?"
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It is the branch of philosophy that deals with the nature and value such as in ethics and religion. It answers the question "What is the nature of values?"
