Subject: Occam's Razor
Author:
Posted on: 2015-01-13 09:16:00 UTC

As far as I remember, we have only ever seen Reparo mending things that were literally broken into pieces. I assume that it is a simple spell and cannot do more. Harry’s watch becoming wet and then becoming rusty is a more complex damage and would require a more complex spell, if there even is any. Oh, and an attempt to magically reassemble the watch after taking it apart would probably result in all moving parts sticking together, because that is what Reparo does.

To clarify the potions comment: I tried to suggest that the magical developer potion would not only make the persons on the pictures move, it would also magically increase the film's photo-sensitivity, so that Colin could get good pictures in a room lit only by candles. But this assumption doesn’t work, because Lockhart’s photographer, who would presumably use the same magical developer potion, apparently had some kind of flash on his camera, and I don’t imagine that Hogwarts corridors are lit brighter than a book shop.

Thank you for catching Collin the mini-Aragog. He probably spun his webs all over the notes on my hard drive. I’m going to cleanup now.

HG

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