To contrast with the only objective theory of truth—the correspondence theory—here are few examples of non-objective theories of truth. The Constructivist theory: Truth is merely socially constructed. According to this theory what is true in one culture, race, or gender can be false in another culture, race, or gender. This theory assumes idealism and is therefore self-refutting.
The Consensus theory: Whatever is agreed upon is true. According to its own standards, this theory is false since I do not agree with it. This too assumes a form of idealism and is therefore self-refutting.
The Pragmatic theory: Truth is whatever works. This theory confuses an indication of truth (what works) with truth itself. Pragmatic theory of truth can lead to relativism. If what "works" for you is different from what "works" for me, then what is true for you may be different from what is true for me. Therefore, the pragmatic theory of truth also rests on a form of idealism and is self-refutting.