From: Todd Benson Date: 2008-07-03T07:04:36+09:00 Subject: Re: Ranges and Enumerable problems On Wed, Jul 2, 2008 at 3:50 PM, Rick DeNatale wrote: > !(for all s: (s <=>s.succ) == -1) Well, not really. That gives you no information as to whether such a thing does exist. That statement would be true, but not definitive, meaning, that it would be true if there is _no_ s that satisfies. I think Robert was going for "at least 1" in his statement. But, I guess that's just making a mountain out of a mole hill, because I think Rick was just pointing out something, and not trying to be being rigorously complete. Todd