Try to prove anything completely, and you hit one of three dead ends

Ask why any belief is justified, then ask why that justification is justified, and so on, and philosopher Hans Albert argued you land in one of three unsatisfying places: an infinite regress that never finishes, a circular argument that loops back on itself, or an arbitrary stopping point declared true without proof. He named it after Baron Munchausen, who claimed to pull himself out of a swamp by his own hair. The problem is ancient, traced back to the Greek skeptic Agrippa.

— Hans Albert, Treatise on Critical Reason — Traktat uber kritische Vernunft, 1968