 Kilwardby offers a two-fold consideration of logic, in a stricter and in a broader sense. In the broader sense, logic is a science of speech (scientia sermocinalis), dealing with correct expression, including grammar, rhetoric, and dialectic (logic in the strict sense). In the stricter sense, logic is the science of reasoning (scientia rationalis) (DOS 492). Logic is the science of reasoning because it considers and teaches the discovery of terms, their organization into complex expressions, and the combination of complex expressions into syllogistic demonstrations; but it is also the science of speech because it deals with the linguistic expression of reasoning—which does not remain, as Kilwardby says, hidden (inchoate) in the mind (DOS 578): mental words are about things, spoken words are about mental words, and written words are about spoken words (DOS 593).