Of Judgements expressed by means of Privation, addressed to Thearus, one book. Of Indefinite Judgements, addressed to Dion, three books. On the Variety of Indefinite Judgements, four books. On Temporal Judgements, two books. On Judgements in the Perfect Tense, two books. Second series : Of a True Disjunctive Judgement, addressed to Gorgippides, one book. Of a True Hypothetical Judgement, addressed to Gorgippides, four books. Choosingfrom Alternatives, addressed to Gorgippides, one book. A Contribution to the Subject of Consequents, one book. On the Argument which employs three Terms, also addressed to Gorgippides, one book. On Judgements of Possibility, addressed to Clitus, four books. A Reply to the Work of Philo on Meanings, one book. On the Question what are False Judgements, one book. Third series : Of Imperatives, two books. Of Asking Questions, two books. Of Inquiry, four books. Epitome of Interrogation and Inquiry, one book. Epitome of Reply, one book. Of Investigation, two books. Of Answering Questions, four books. Fourth series : Of Predicates, addressed to Metrodorus, ten books.