Not entirely serious: recursive lambda?

[Michael Tobis]

Thanks all! What a remarkable set of answers, intelligent, thought
provoking and informative without exception.

Of course, now I can't use Paul's version; it hardly counts as a japh
if someone else wrote it! It is probably the closest to my original
vision, alas. Miles' second suggestion was the one I was fumbling
toward; I will study it. No spoilers please.

best
mt