The dialectical method connects premises to the conclusion so that the audience can follow an inferential move. The verse beginning *Law kāna fīhimā ālihatun...* exemplifies conditional argument.
Ḥusn al-taʿlīl assigns a nonliteral but delicate cause to a quality. Established qualities yield two modes according to whether their usual causes are evident. Unestablished qualities yield two according to whether they are possible or impossible. A cause suggested tentatively is a further associated form.
The governing analytical principle is to keep evidence, actual causation, and imaginative fittingness distinct.