Golpalott’s Third Law. Interesting. It was a law that could be summed up rather easily. When it comes to antidotes and poisons, the law dictates that a true antidote for a blended poison is more effective than a blended antidote. Which was mostly true. Though, depending on the poisons used, you could create an antidote, that while not a blended antidote with various parts of antidotes in one, that would work. Various ingredients do have other properties that can help fight off poisons. But I’m sure that was not where Professor Slughorn was going. 