On Thu, 2015-07-16 at 14:37 -0400, grarpamp wrote: > On Thu, Jul 16, 2015 at 1:22 PM, Tom van der Woerdt <info@xxxxxxx> wrote: > > https://en.wikipedia.org/wiki/If_and_only_if > > Aha, documentation, use presumed consistent, carry on, thanks. Actually the "use it freely" reference there describes iff as a borderline case of w.l.o.g., s.t., etc. and suggests that iff be explicitly defined when used in non-mathematical writing. I avoid it even in mathematical articles myself on the grounds that it's poor erasure coding and easy to miss-read. There is a tangible advantage in writing faster on a blackboard that disappears in print. Jeff
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