I known it seems to be obvious but I consider that it is not so.
Can you distinguish between a "learned or computed" value from a guess or completely random generated value?
So are you referring exclusively to exact methods that will "solve" the problem exactly well all the times? i.e. with convergence guaranteed? What does it means solving?
So I have to conclude that this is "enclosed or implicit" in the "efficient" conditional that you put at the begining of the phrase or in the "solving" word.
Am I misunderstading something?