Wording the Proposition
The proposition should be accurately worded. In law if the word burglary is used in the indictment, the defense, in order to quash the charge, need show merely that a door was unlocked. The phrasing should be as simple and concise as possible. The proposition should not cover too wide a field. Although these directions seem self-evident they should be kept in mind continually.
When the proposition is satisfactory to the maker of the argument he is ready to begin to build his proof. In actual speech-making few arguments can be made as convincing as a geometrical demonstration but a speaker can try to make his reasoning so sound, his development so cogent, his delivery so convincing, that at the end of his speech, he can exclaim triumphantly, "Quod erat demonstrandum."