The limitation on Time Turners is that they cannot send information back farther than six hours, through any sequence of people or Time Turners.
However, “information” here has been shown to have a very loose, non-physical definition—in the same way that brooms are Aristotelian, magical “information” has an intuitive definition. Bones is able to tell Dumbledore about the existence of future information (presumably) without automatically barring Dumbledore from then traveling back himself, for example.
So it’s possible, then, that “information” could be erased simply by hitting yourself with a Memory Charm, allowing you to travel back farther than six hours with a Time Turner depending on how much you erased. This would solve the general problem of the Peggy Sue hints, by allowing Harry to solve time travel using foreshadowed methods in the remaining fifteen-twenty chapters or so of the fic.
As far as the point… well, while “information” hasn’t passed through time, information certainly has. Harry is more mature, more driven, and, most importantly, knows that something bad enough happened to cause him to travel back in time. He will be viewing everything that happens in his first year as either a potential existential threat, or a potential threat to someone he or past-he cares about.
… Sudden idea.
The limitation on Time Turners is that they cannot send information back farther than six hours, through any sequence of people or Time Turners.
However, “information” here has been shown to have a very loose, non-physical definition—in the same way that brooms are Aristotelian, magical “information” has an intuitive definition. Bones is able to tell Dumbledore about the existence of future information (presumably) without automatically barring Dumbledore from then traveling back himself, for example.
So it’s possible, then, that “information” could be erased simply by hitting yourself with a Memory Charm, allowing you to travel back farther than six hours with a Time Turner depending on how much you erased. This would solve the general problem of the Peggy Sue hints, by allowing Harry to solve time travel using foreshadowed methods in the remaining fifteen-twenty chapters or so of the fic.
As far as the point… well, while “information” hasn’t passed through time, information certainly has. Harry is more mature, more driven, and, most importantly, knows that something bad enough happened to cause him to travel back in time. He will be viewing everything that happens in his first year as either a potential existential threat, or a potential threat to someone he or past-he cares about.