Aristotle in his Categories 10, 13a37ff, De Interpretatione 4f, 17a8–37; 10, 19b5– 20b12 and Prior Analytics i.2, 25a1–13; i.46, 51b5–52b35 introduced a distinction between affirmative and negative (kataphátikos and apophátikos, or in noun form katáphasis and apóphasis). Aristotle’s views are not my concern here. But already Aristotle’s treatment of the notions raises some fundamental questions:
