What is known as a self-evident truth?

A self-evident truth is best described as an axiom. An axiom is a statement or proposition that is regarded as being self-evidently true and does not require any proof within a particular theoretical framework. Axioms serve as foundational building blocks in various fields such as mathematics and logic, as they establish basic principles from which other truths can be derived.

In contrast, a premise is a proposition that serves as a foundation for an argument but may require evidence or support. An assumption is a belief or statement taken for granted without proof, which may not necessarily be self-evident. A theorem, on the other hand, is a statement that has been proven based on axioms and other established theorems, and it requires a demonstration of its validity rather than being accepted at face value. Thus, identifying an axiom as a self-evident truth aligns with its role as a fundamental and accepted proposition within formal systems.