argumentum

Etymology
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Noun

 * 1) * 1682: Sir Edward Coke, Argumentum anti-Normannicum, main title (John Darby)
 * Argumentum anti-Normannicum: or, An argument proving, from ancient histories and records, that William, Duke of Normandy, made no absolute conquest of England by the sword; in the sense of our modern writers.
 * Argumentum anti-Normannicum: or, An argument proving, from ancient histories and records, that William, Duke of Normandy, made no absolute conquest of England by the sword; in the sense of our modern writers.

Noun

 * 1) argument (as in an argument for a position); evidence, a proof
 * 2) a point, a theme
 * 3) a topic, thesis
 * 4) a plot, especially in theater.