Full Idea
It belongs to dialectic to survey equally all kinds of syllogism.
Clarification
Syllogism are structured arguments, built up from premisses
Gist of Idea
It is the role of dialectic to survey syllogisms
Source
Aristotle (The Art of Rhetoric [c.350 BCE], 1355a08)
Book Reference
Aristotle: 'The Art of Rhetoric', ed/tr. Lawson-Tancred,H.C. [Penguin 1991], p.68
A Reaction
Since dialectic is central to philosophy, this implies that philosophers ought to be students of logic. This duty seems to me to be taken more seriously in the analytical tradition than in the 'continental' tradition.