Enthymeme (en’-thy-meem): 1. The informal method [or figure] of reasoning typical of rhetorical discourse. The enthymeme is sometimes defined as a “truncated syllogism” since either the major or minor premise found in that more formal method of reasoning is left implied. The enthymeme typically occurs as a conclusion coupled with a reason. When several enthymemes are linked together, this becomes sorites. 2. A figure of speech which bases a conclusion on the truth of its contrary. [Depending on its grammatical structure and specific word choice, it may be chiasmus].
1. It’s noon. Let’s eat!
2. If tranquility should be pursued, tumult should be avoided.
Definition courtesy of “Silva Rhetoricae” (rhetoric.byu.edu). Bracketed text added by Gorgias.