Expeditio (ex-pe-di’-ti-o): After enumerating all possibilities by which something could have occurred, the speaker eliminates all but one (=apophasis). Although the Ad Herennium author lists expeditio as a figure, it is more properly considered a method of argument [and pattern of organization] (sometimes known as the “Method of Residues” when employed in refutation[, and “Elimination Order” when employed to organize a speech. The reference to ‘method’ hearkens back to the Ramist connection between organizational patterns of discourses and organizational pattern of arguments]).
Me: Why are you going to school today?
1. To hang out with friends?
2. To make trouble?
or
3. To learn something?
Number One is a waste of time. Number Two is a total disaster. That leaves number three–learning is school’s purpose!
So, “to learn something” is why you’re going to school today. Right?
You: Yes, Ma.
Me: Good! You’re on your way to fame and fortune!
You: Yes, Ma.
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Definition courtesy of “Silva Rhetoricae” (rhetoric.byu.edu). Bracketed text
