You generate it in a way that is verifiably random. If your sufficiently complex system can still "predict" the solution reliably, then you bite the bullet and

You generate it in a way that is verifiably random. If your sufficiently complex system can still "predict" the solution reliably, then you bite the bullet and admit that it does, in fact, understand what it is trying to solve in some way, even if you don't know how exactly it does it.