"For Plato, true knowledge comes when one person makes a statement and another asks, 'what do you mean?' Such a request forces the speaker to 're-say', that is, to say in different words what he or she means" (Gee, 1989).
Gee, J. P. (1989). The Legacies of Literacy: From Plato to Freire Through Harvey Graff. Journal of Education, 171, 147-165.