Kurumi sat back and thought about things for a moment, listening to her classmates offer up their answers to various exceptions and nodding along as she did with a few swift movements over her parchment as she took notes. After a bit, Kurumi raised her hand. "I think the key word with all these exceptions is create. You can change something into something else using transfiguration spells, but creating something is entirely different. We know that with the aide of the Philosopher's Stone we can transform other metals into gold but cannot create it." Not to mention what had been said about making gold by some of her classmates. Because if everyone had a Philosopher's Stone and were transfiguring gold left and right...well...then there would be some serious issues. "Likewise, the Philosopher's Stone is capable of making the Elixir of Life which can extend life, but doesn't necessarily create it." Unless you wanted to look at extension in an abstract sense in which case it did sort of create life...but that was over thinking things.