"In a sense," he half-agrees, because he must be pedantic or die. "Except that the grail is known to have at one point existed, whether it still does or not, or ever held any of the properties attributed to it or not. The Stone may or may not be a possible object, and, if possible, may not be an object at all. But in the sense of both being ultimate goals, which ennoble their questers' journeys whether or not ever attained, and in that any physical thing called by their names is likely to be the truth of them, yes."
He listens to this gravely. "Certainly I can. And--" Stopping himself, he then goes on. "Of course, any speculation of mine is quite beside the point. What do you believe he meant by it, or what were you looking for?"