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Taylor Campbell <campbell@xxxxxxxxxx> writes: > If Aubrey Jaffer's suggestion of NaNs encapsulating information about > their origin be adopted, I think it would make sense to extend the NAN > procedure to accept more arguments, of any nature, to specify any > information whatsoever about the condition, like T's UNDEFINED-VALUE > mechanism. Of course, one possible value would be (LAMBDA ARGS (/ 0.0 > 0.0)). Didn't I already suggest this too? :)