Truth is not "that which coheres." Some thinkers have suggested that truth is what is internally consistent; it is coherent and self-consistent. But this too is an inadequate definition. Empty statements hang together; even though they are devoid of truth content. "All wives are married women" is internally consistent, but it is empty. It tells us nothing about reality. The statement would be so, even if there were no wives. It really means, "If there is a wife, then she must be married." But it does not inform us that there is a wife anywhere in the universe. A set of false statements also can be internally consistent. If several witnesses conspire to misrepresent the facts, their story may cohere better than if they were honestly trying to reconstruct the truth. But it still is a lie. At best, coherence is a negative test of truth. Statements are wrong if they are inconsistent, but not necessarily wrong if they are.
https://www.youtube.com/watch?v=EfS4SDM_JFc
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