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Based on the title, I was nearly convinced that this would be about Arthur Whitney (author of the K and Q programming languages)

Or perhaps Albert Gräf, also the creator of a language named Q (now defunct): http://q-lang.sourceforge.net/

Well, defunct is a little harsh since its succesor Pure really is quite similar: https://agraef.github.io/pure-lang/

From Harper's? Not likely. Alas.