1. E.g.,Oxford English Dictionary (Oxford: Clarendon Press, 1933), vol. 8, p. 1660, ‘puzzle’ entry § 2, and etymology. Also cf. Webster'sNew International Dictionary (Springfield, Mass.: G. & C. Merriam Co., 1960), p. 1925, ‘pose’ entry.
2. Thomas Kuhn,The Structure of Scientific Revolutions (Chicago: University of Chicago Press, 1962), rev. ed. 1969, pp. 37, 36. [hereafter cited as SSR].
3. Webster'sNew International Dictionary, p. 2022, italics added, and OED, vol. 8, p. 1660, ‘puzzle’ entry § 3.
4. Kuhn, SSR, pp. 35–42.
5. Kuhn, “Logic of Discovery or Psychology of Research?” in Imre Lakatos and Alan Musgrave, eds.,Criticism and the Growth of Knowledge (Cambridge: Cambridge University Press, 1970), p. 5, n. 1, some italics added. [hereafter as CGK].