I just noticed that my move from (= ]) to (= +/) did not generalize "entirely false" for arrays of any rank. I should have used (= +/@:,)
And, as noted in my prior posting, we can't necessarily presume that this (+/@:,) fits what will be needed for the expanded meaning of "false". The expansion of meaning would have to be tamed by giving it specific context, as a start. T ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
