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>pps. let and letrec are both binding constructs. I don't see why we >need two different forms. Why not just use 'let,' and if any of the >right-hand-sides happen to refer to the name they're bound to, >implicitly change the whole thing into a letrec? I think this would >be much simpler and avoid lots of confusion. Personally I think this whole LET business is a wart (and probably inherited from BASIC, to boot -- good grief!) We should all be programming in CPS. --lars