Book 6
1.5
But I must refrain from dealing with the various methods individually, for fear that the instances that I produce should be regarded as exhaustive, whereas our opportunities spring from the nature of the particular case, from the statements of our opponents and also from fortuitous circumstances. Nor must we restrict ourselves to recapitulating the points of our own speech, but must call upon our opponent to reply to certain questions.
1.6
This however is only possible if there is time for him to do so and if the arguments which we have put forward are such as not to admit of refutation. For to challenge points which tell in our opponent's favour is not to argue against him, but to play the part of prompter to him.