This article presents a classification of conjectures on the text of the New Testament. It focusses on the types of arguments used by conjectural critics. The argumentation for a conjecture basically comprises (1) the perception of a problem (or problems) in the transmitted text and (2) the suggestion of a cause (or causes) for the supposed scribal change. Type (or types) of perceived problems and of supposed causes are classified, and illustrated with a range of important conjectures.Congratulations to Bart for this important step in his dissertation project and pour le plaisir de se voir imprimé.
Critical reactions are welcome, of course. In any case we hope the classification offered here will prove to be useful for many studiosi.