Doug comes from a relatively mana-poor world, and that world's mages therefore use mana much more efficiently. Much of that is probably genetic, but I wouldn't be at all surprised if it was almost half memetic, and therefore teachable. Combine that with tapping into environmental mana, and perhaps Doug can do something about this "squib" nonsense. (The books generally treat Squibs as Wizarding folk who can't cast spells, rather than full-on Muggles from Wizarding get: they can see Dementors and Hogwarts, for instance. This implies that they merely have insufficiently-large internal mana pools, which is something that can be worked around.)
Which would, of course, really put Umbridge's panties in a twist: not only is he unclassifiable himself, but he's messing with the classifications of people she's already labeled! How dare he!
On the other hand, Doug won't be at all inclined to teach Filch after his attitude comes to light, which won't take very long. On the gripping hand, perhaps Doug will run into Arabella Figg?
On an almost completely unrelated tangent, Rowling loves Significant Names: "Albus" means "white"; Minerva was (if I recall correctly) the Roman name for Sophia, the embodiment of wisdom and knowledge; Severus Snape is severe and prone to verbally sniping at people; Argus Filch has a huge collection of confiscated items. So what's with "Arabella Figg"?
Which would, of course, really put Umbridge's panties in a twist: not only is he unclassifiable himself, but he's messing with the classifications of people she's already labeled! How dare he!
On the other hand, Doug won't be at all inclined to teach Filch after his attitude comes to light, which won't take very long. On the gripping hand, perhaps Doug will run into Arabella Figg?
On an almost completely unrelated tangent, Rowling loves Significant Names: "Albus" means "white"; Minerva was (if I recall correctly) the Roman name for Sophia, the embodiment of wisdom and knowledge; Severus Snape is severe and prone to verbally sniping at people; Argus Filch has a huge collection of confiscated items. So what's with "Arabella Figg"?