1. Scheffler, I.: 1960 The language of education (Springfield, Illinois: Charles C. Thomas).
2. Perhaps I should say “in the context of rational argument”, since that is really my point; I assume that learned journals and scholarly articles are concerned with rational argument rather than other modes of communication.
3. Scheffler, I.: 1979 Beyond the letter: A philosophical inquiry into ambiguity, vagueness and metaphor in language (London: Routledge and Kegan Paul).
4. Ibid. p. 129.
5. Something of what that answer is will become apparent as we proceed.