The sources for the early Peripatetic views on dialectic are scarce. They enable us conjecturally to credit Theophrastus with six main contributions to this area: (1) a new grouping of the predicables; (2) the inclusion of the problems pertaining to sameness among those pertaining to genera; (3) an examination of issues pertaining to division and classification; (4) a definition of ‘place’ (absent from Aristotle’s Topics); (5) an interest in inferences that look like instances of modus ponens; (6) a detailed examination of ‘precepts’ (i.e., instructions about how to proceed in a dialectical discussion). The evidence for Eudemus and Strato is even poorer: Eudemus appears to have emphasized the destructive character of dialectic and to have reflected on the status of dialectical propositions; Strato seems to have studied rather technical issues and to have added some ‘places’ concerning priority.