The weakness of this argument is that it requires a previously unmentioned detail, that Malfoy knows Voldemort uses riddle puns.
It only requires that Malfoy knows Voldemort to be Tom Riddle -- which in canon he did.
I don't know why you think I didn't know this. But there is a difference between knowing Tom Riddle is Voldemort and knowing that Voldemort's secret identities often use Riddle puns. This difference is poignantly illustrated by the fact that HPMOR Harry knows Tom Riddle is Voldemort but never catches on to the Riddle puns. If you're going to correct me, please make sure that I'm actually wrong in the first place.
Additionally, I explicitly said that this objection was only weak and that the theory was still fairly strong. I don't know why you would make this comment unless you're fishing for karma or you love to argue about trivial and stupid things.
The next discussion thread is here.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 84. The previous thread has passed 500 comments. Comment in the 14th thread until you read chapter 84.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: