I thought the argument was Good. I thought it could had been better. For one Dumbledore is not Harry's Guardian, so has no authority to tell harry where he can spend his time. I wish that some author would write this part in a story. I alway thought that Dumbledore Manipulated Harry. Think about this when James & Lily was killed, Sirius turn up and wanted Custody of godson. But was told by hagrid that Dumbledore told him that Harry goes to Lily sister. That was out of line. Think from Sirius point of view. His best friend and wife is dead. He lost custody of Godson, His other best friend and the order is going think he betrayed the potters. Because they think he was the secret keeper, and not to know how they are. He had nothing to lose, he would go after peter. Dumbledore started this whole mess. My understand is Dumbledore is only one that has eough power to hid the power. If he did the spell why did not know who was the seecret keeper? I am sorry if this kind of long. I love to read and I thought this good time point out my question and my point of view.
Author's response
You have a perfectly valid point about Sirius. I suspect JKR hadn't fully developed the whole story when she first started. You could also ask how did Hagrid get to Godric's Hollow in the first place and how was he going to get Harry to Dumbledore without borrowing Sirius's flying motorcycle. Looking back with all we know now it seems sloppy and haphazard, but I guess at that point she was just trying to sell a book. --Jim