The Commens Dictionary
Quote from ‘Logic (exact)’
Dialogism. A form of reasoning in which from a single premiss a disjunctive, or alternative, proposition is concluded introducing an additional term; opposed to a syllogism, in which from a copulative proposition a proposition is inferred from which a term is eliminated.
DPP 2:26; CP 3.623
‘Syllogism’ (pub. 11.08.17-08:59). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-logic-exact-4.