 According to Brito, logic is a theoretical science dealing with the methods of scientific-knowledge acquisition (modi sciendi, hereafter ‘methods of knowledge’) (QsP; see Ebbesen &amp; Pinborg 1981–1982: 301). However, since the syllogism is the method of knowledge par excellence, and that to which all the other methods of knowledge are subordinated, it can also be posited as the general subject matter of logic.