There's been a bit of a discussion about the short-cutting conditional
lists implemented by IF, WHEN, et al. I find that construct very useful,
but as the discussion on the list has revealed, it has its limitations.

It would actually be fairly trivial to implement AND and OR operators that
can do short-cut evaluation. Of course, this is not possible for XOR, which
always requires both values. The real questions are 1) should it be done
and 2) what should the operator be. I've been tentatively using *& and *|
in my thinking about this, but there are certainly other possibilities.

Rick
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