It is too clever and too impossible, which was ever Voldemort’s signature since the days he was known as Tom Riddle.
Dumbledore knows that Voldemort is Tom Riddle, so the double-game wouldn’t have worked. Maybe Dumbledore only found out that they were one and the same later on?
Snape and Mad-eye Moody also know it’s Riddle since they poison his father’s grave. Minerva was present when Dumbledore said that, and did not comment on it (‘surely not the heroic Riddle, our old ally!’). So we have multiple examples, but they’re all trusted key members of the Order who even know about Horcruxes, so they don’t tell us anything about when the identity was found (assuming I’m right).
Something doesn’t quite fit.
Dumbledore knows that Voldemort is Tom Riddle, so the double-game wouldn’t have worked. Maybe Dumbledore only found out that they were one and the same later on?
Snape and Mad-eye Moody also know it’s Riddle since they poison his father’s grave. Minerva was present when Dumbledore said that, and did not comment on it (‘surely not the heroic Riddle, our old ally!’). So we have multiple examples, but they’re all trusted key members of the Order who even know about Horcruxes, so they don’t tell us anything about when the identity was found (assuming I’m right).