EPISTEMOLOGY is related to knowledge while Ontology is related to reality. Epistemology seeks to understand the nature, sources, and scope of knowledge; Ontology, to understand the nature of reality. Epistemology deals with the meaning of Truth; Ontology deals with the meaning of reality. True or false is predicated of statements only. Real or unreal is predicated of existence. Therefore, logic and semantics are important issues in the study of truth. Truth is mental; reality is essential. Truth is dependent on reality; reality is independent of truth. Truth is usually contextual. There are different kinds of truths that are truthful only within their contexts. For instance, there are poetical truths expressed in statements that would appear total falsehood in any other linguistic context or genre. Truth is that which is known about reality. As such, therefore, truth, in common experience, is substantial.