Full Idea
Reasoning is dialectical which reasons from generally accepted opinions.
Gist of Idea
Dialectic starts from generally accepted opinions
Source
Aristotle (Topics [c.331 BCE], 100a30)
Book Reference
Aristotle: 'Posterior Analytics and Topica', ed/tr. Tredennick,H/Forster,ES [Harvard 1960], p.273
A Reaction
This is right at the heart of Aristotle's philosophical method, and Greek thinking generally. There are nice modern debates about 'folk' understanding, derived from science (e.g. quantum theory) which suggest that starting from normal views is a bad idea.