Correspondence theory is a philosophical concept that asserts the truth of a statement is determined by how accurately it reflects reality. In other words, a belief or proposition is considered true if it corresponds to the actual state of affairs in the world. This theory is often associated with the works of philosophers like Aristotle and Bertrand Russell. In correspondence theory, the relationship between language and the world is crucial. For example, if someone says, "The sky is blue," this statement is true if, in reality, the sky is indeed blue. This theory contrasts with other theories of truth, such as coherence theory and pragmatic theory, which define truth differently.