What is magic?

[finwitch]

No: HPFGUIDX 42516

So-- what do we see of magic in Potterverse?

1) Some can do it and some can not.
2) When it's strong, electric devices stop working.

This effect against electricity is perhaps the most nominating.

Anyway- magic in Potterverse - how about it being a force like 
magnetism - except that it works on non-magnetic things like coal 
(which is an odd element: leads electricity but isn't magnetic?) or 
perhaps some sort of anti-electricity. Flow of positrons, perhaps...

Well, that's how I picture it, anyway...

-- Finwitch