The article offers a diachronic and comparative analysis of different standards of proof for a criminal conviction.The first part focuses on the attempt of medieval and early modern Roman-canon systems to clarify this type of rule through a network of Toe Protection legal proofs.The second part analyses the origins of the main standards for a criminal conviction used today: moral certainty, beyond reasonable doubt and intime conviction.The final part looks to the future, asking whether traditional decision-making criteria should be maintained or replaced by new PLATINUM 100% BETA ALANINE ones based on the principles of contemporary epistemology.