Coherence theory is a philosophical concept that suggests the truth of a belief or statement is determined by its consistency with a set of other beliefs. According to this theory, a belief is true if it fits well within a larger, interconnected system of beliefs, rather than being verified by direct observation or empirical evidence. This approach contrasts with other theories of truth, such as correspondence theory, which asserts that truth is based on how accurately a statement reflects reality. Coherence theory emphasizes the importance of logical relationships and the overall harmony of ideas in establishing what is considered true.