1. This paper reviews recent results showing the abstract equivalence of all the main psychological competence models of syllogistic reasoning.

2. Other articles where Contraposition is discussed: syllogistic: …type of inference is called Contraposition and is produced by the fact that some propositions imply the proposition that results from the original proposition when both of its term variables are negated and their order reversed.

3. In Łukasiewicz's 1951 book, Aristotle's Syllogistic from the Standpoint of Modern Formal Logic, he mentions that the principle of his notation was to write the functors before the arguments to avoid brackets and that he had employed his notation in his logical papers since 1929.

4. …be, that is the question”), Congeries (an accumulation of statements or phrases that say essentially the same thing), apostrophe (a turning from one’s immediate audience to address another, who may be present only in the imagination), enthymeme (a loosely syllogistic form of reasoning in which the speaker assumes that any…