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“A five-year-old could have told us as much,” sneered Snape. “The Inferius is a corpse that has been reanimated by a Dark wizard’s spells. It is not alive, it is merely used like a puppet to do the wizard’s bidding. A ghost, as I trust that you are all aware by now, is the imprint of a departed soul left upon the earth, and of course, as Potter so wisely tells us, transparent.”
“Well, what Harry said is the most useful if we’re trying to tell them apart!” said THE MYSTERY PERSON. “When we come face-to-face with one down a dark alley, we’re going to be having a look to see if its solid, aren’t we, we’re not going to be asking, ‘Excuse me, are you the imprint of a departed soul?’”
There was a ripple of laughter, instantly quelled by the look Snape gave the class.
Who is Ron Weasley?