"If we ask of any knowledge: “How do I know that it’s true?”, we may provide proof; yet that same question can be asked of the proof, and any subsequent proof. The Münchhausen Trilemma is that we have only three options when providing proof in this situation:
The circular argument, in which theory and proof support each other (i.e. we repeat ourselves at some point)
The regressive argument, in which each proof requires a further proof, ad infinitum (i.e. we just keep giving proofs, presumably forever)
The axiomatic argument, which rests on accepted precepts (i.e. we reach some bedrock assumption or certainty)"
