The Self-Evident Principle is an AXIOM, which is a statement or proposition that is accepted as true without the need for proof. It is a fundamental truth that is assumed to be true and serves as the basis for other truths. The Self-Evident Principle is often used in philosophy and law to refer to a basic truth that is accepted without the need for further justification. This principle is also known as the Law of Non-Contradiction, which states that something cannot both be true and false at the same time.