Absolute Truths Must Exist. The claim that they do not exist is self-contradictory because that itself is a statement of absolute truth to be truth.
Truth is a Metaphysical Reality. Objective truths, meaning truths that exist independent of human observation, MUST exist, but they obviously do not PHYSICALLY exist. Therefore, we as philosophers call them metaphysical realities.
Metaphysical Truth Must Have a Source. It makes no sense to have a DEFINITION (which is what truths are) without a definer.
Therefore, there must be a transcendent entity that exists and defines those objective, metaphysical truths by creating reality.