Au contraire my friend Terrell, Lewis did but purloin after perusing Aristotle's "Interpretation," so that the term is much, much older than you surmise, with or without your hallucinogenic crutch: As there are in the mind thoughts which do not involve truth or falsity, and also those which must be either true or false, so it is in speech. For truth and falsity imply combination and separation. Nouns and verbs, provided nothing is added, are like thoughts without combination or separation; 'man' and 'white', as isolated terms, are not yet either true or false. In proof of this, consider the word 'goat-stag.' It has significance, but there is no truth or falsity about it, unless 'is' or 'is not' is added, either in the present or in some other tense. Likewise the word 'bitch-slap', often used by those swarthy Estruscan sailors who claim to have first discovered syphilis. It is simple combination and separation, this light of truth and shade of falsity.