On 2007/02/04, at 11:17, Daniel Lucraft wrote: > That sounds right. How about if you have an equation a == b, you > should > not be able to find equations c == d, and e == f such that c + e > makes a > and d + f makes b? Wouldn't a prolog script be better at describing all the rules than trying to figuring them out? If someone developed a prolog script that would behave as the final ruby script should, we would then have the specs without a shadow of doubt. Just don't look at me to write it =P Paulo Jorge Duarte Köãh paulo.koch / gmail.com