Truth

There are three "primary truths" inherently accepted in the investigation of knowledge and truth. They are the first fact (the fact of our existence), the first principle (the principle of non-contradiction) and the first condition (the ability of the mind to know truth). They cannot be validated with positive proof, as they are an inherent in every analysis. As a demonstration of their a priori nature, a person objecting to these essential truths cannot set a standard of proof without implicitly accepting the premises.