Harry glanced in the Dementor’s direction. The word echoed in his mind again.
All right, Harry thought to himself, if the Dementor is a riddle, what is the answer?
Somewhat later in HPMOR, Dumbledore does (obliquely) indicate that Voldemort = Tom Riddle. (Or at least he indicates that he believes this. There’s enough identity-confusion in HPMOR that I don’t think we can be entirely certain that he’s right.)
I just thought of another from an earlier chapter.
Equal, as in mathematical equality.
Also, from Ch. 45: “A strange word kept echoing in his mind.” Probably ‘horcrux’. [ETA: gjm’s right. Missed that.]
I thought the strange word was “riddle”.
Oh.
I get it now. *foreheadsmack*
Not that that doesn’t equally support the Harrymort theory.
If anything, that supports their theory.
Somewhat later in HPMOR, Dumbledore does (obliquely) indicate that Voldemort = Tom Riddle. (Or at least he indicates that he believes this. There’s enough identity-confusion in HPMOR that I don’t think we can be entirely certain that he’s right.)