Dumbledore laughed outright at this, which made Severus frown at him. He knew Dumbledore well, but sometimes he still reacted in ways that were puzzling. "It is a great tragedy of our culture, Severus, that goblin insincerity is the first thing most wizards will suggest," said the Headmaster. "No, I do not think they are lying at all! I think that they assume, perhaps rightly, that what information they have is too sensitive for the ears of the Wizengamot." Oh. Well, that was fair; the Wizengamot were full of decrepit old noble folk and grasping politicians, and there were a great many things in the world that it was probably safer for them not to know.