n.1.(Rhet. & Logic) A syllogism in which the proof of the major or minor premise, or both, is introduced with the premises themselves, and the conclusion is derived in the ordinary manner.
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In a significant number of his exegetical commentaries the arguments are short and simple, having just a rationale that supports the proposition, theme or issue, as in Aristotle's enthymeme (21), or adding to the rationale a supporting argument to confirm it, as in Quintilian's epichirema (22) and Ciceros ratiocinatio (23).