Conformity of mind and reality. Three kinds of conformity give rise to three kinds of truth. In logical truth, the mind is conformed or in agreement with things outside the mind, either in assenting to what is or in denying what is not. Its opposite is error. In metaphysical or ontological truth, things conform with the mind. This is primary conformity, when something corresponds to the idea of its maker, and it is secondary conformity when something is intelligible and therefore true to anyone who knows it. In moral truth, what is said conforms with what is on one's mind. This is truthfulness and its opposite is falsehood.