الحجة على ثلاثة أقسام: أحدها القياس، وثانيها الاستقراء، وثالثها التمثيل.
Argument has three divisions: syllogism, induction, and analogy.
The division concerns the route of reasoning. Syllogism derives a necessary consequence from structured premises; induction moves from particular observations toward a general claim; analogy transfers a judgment from one particular case to another through a relevant shared feature.
These three kinds are named at this point in the source. Here we establish their basic differences; their extended treatments belong to later parts of the book.