On Sat, 10 Dec 2011 09:01:16 +0100, Jonathan M Davis <jmdavisProg at gmx.com> wrote: > Part of me thinks that NaN should be equal to NaN, but it's likely too > late > for that at this point, even if it were determined to be a good idea. sqrt(-1.0) == 0.0/0.0? I don't think so.