Book II

.: an exposition by Cicero of Carneades' positive teaching, practically the same as that given by Catulus in ed. I.; to this was appended, probably, that foretaste of the negative arguments against dogmatism, which in ed. 1. had formed part of the answer made by Cicero to Hortensius. Book III .: a speech of Varro in reply to Cicero, closely corresponding to that of Lucullus in ed. 1.