Most likely. What I don’t remember is whether or not Dumbledore ever gave it back to Fred and George; he presumably did if Quirrel stole it, since I doubt he would have had an easy time getting it from Dumbledore unnoticed. And if we didn’t get confirmation that Dumbledore returned it, I suppose this might fuel “Dumbledore did it” theories. Most of my probability mass goes to Quirrel, though.
Most likely. What I don’t remember is whether or not Dumbledore ever gave it back to Fred and George; he presumably did if Quirrel stole it, since I doubt he would have had an easy time getting it from Dumbledore unnoticed. And if we didn’t get confirmation that Dumbledore returned it, I suppose this might fuel “Dumbledore did it” theories. Most of my probability mass goes to Quirrel, though.
Yeah, I assume Dumbledore gave it back. He didn’t care that they had it before he borrowed it; why would he suddenly begin to care after?
(OK, I can think of a few reasons, but they’re pretty weak and don’t measure up to “Quirrell took it” in probability mass.)