The coherence theory is one of the two traditional theories of truth, the other being the correspondence theory. The coherence theory is characteristic of the great rationalist system-building metaphysicians Gottfried Wilhelm Leibniz, Benedict (Baruch) de Spinoza, G. W. F. Hegel, and Francis Herbert Bradley; but it has also had a vogue with several members of the logical positivist school, notably Otto Neurath and Carl Gustav Hempel, who were much influenced by the systems of pure mathematics and theoretical physics. According to the coherence theory, to say that a statement (usually called a judgment) is true or false is to say that it coheres or fails to cohere with a system of other statements; that it is a member of a system whose elements are related to each other by ties of logical implication as the elements in a system of pure mathematics...