Henceforth I shall use archetype~1~ in the first, i.e., the most widespread, of those ancient and Humanist meanings, that is, in the sense of “official text, prepared by its author for publication” […]. Thus, by further refinements, scholars evolved increasingly rigorous formulations, such as “a lost copy marred by at least one error of the conjunctive type, from which the whole tradition derives”. In this second meaning, the archetype (archetype~2~) can be reconstructed logically – with varying degrees of accuracy – on the basis of the number of conjunctive errors that are common to all its descendants.