"Yes," Enola nodded. "Lily and James worked that out, just as you have. Harry and Tom Riddle are intimately connected, on a far deeper level than Albus Dumbledore ever imagined. The Curse that should have accounted for Harry's life conversely tethered him to it, to Riddle himself, in both of Harry's facial scars and the magical link that they retain to Tom Riddle, who cannot be killed himself because of the perversion of his Horcrux magic. They share an energetic bind on a level that is so similar to what a Horcrux connection feels like that Dumbledore can be forgiven for confusing the two, as what has happened between Harry and Riddle has never happened before, so far as we know."