Full Idea
Dialectical arguments are those which, starting from generally accepted opinions, reason to establish a contradiction.
Clarification
'Dialectic' is the impersonal pursuit of truth
Gist of Idea
Dialectic aims to start from generally accepted opinions, and lead to a contradiction
Source
Aristotle (Sophistical Refutations [c.331 BCE], 165b03)
Book Reference
Aristotle: 'Sophistical Refutations, On the Cosmos etc (III)', ed/tr. Forster,E.S. /Furley,D.J. [Harvard Loeb 1955], p.15