| − | '''Coherence''' is one of the lowest levels of [[ontological]] [[truth]], and a fundamental principle of [[logic]]. In order for a [[theory]] to be coherent, it must not contradict itself... i.e.- it must not maintain 'X' and 'not X' simultaneously. A theory must be coherent before it can aspire to any higher levels of truth - including the classic 'truth', correspondence truth. | + | '''Coherence''' is one of the lowest levels of [[ontological]] [[truth]], and a fundamental principle of [[logic]]. In order for a [[theory]] to be coherent, it must not [[Law of Non-Contradiction|contradict]] itself... i.e.- it must not maintain 'X' and 'not X' simultaneously. A theory must be coherent before it can aspire to any higher levels of truth - including the classic 'truth', correspondence truth. |