(sorry to necrobump!) That's a fair point. I should revisit my critique: IMO, PE should be used to practice conceptual mathematics; if you're trying to perform

(sorry to necrobump!) That's a fair point. I should revisit my critique: IMO, PE should be used to practice conceptual mathematics; if you're trying to perform an exhaustive search, for example, you might want to see if there's a better way.