Full Idea
Dialectic is when men converse by putting short questions and giving brief answers to those who question them.
Clarification
'Dialectic' is the impersonal pursuit of truth
Gist of Idea
Dialectic involves conversations with short questions and brief answers
Source
Diogenes Laertius (Lives of Eminent Philosophers [c.250], 3.1.52)
Book Reference
Diogenes Laertius: 'Diogenes Laertius', ed/tr. Yonge,C.D. [Henry G. Bohn 1853], p.143