So, you're saying it's ok if the algorithm's output is wrong, as long as it's consistently wrong for the same inputs?

Put that way, no, that is not what I am saying (although I knew it would come and bite me in my butt ;-)

Otoh, I might be saying that _if_ the output is wrong, it would be nice to know that it is, and to know by how much it is.

Other than that, of course, I would like it to be good, fast, cheap, free, in Perl, accurate, precise, reliable, concise, and free of carbs.