Thank you, unixasas. I have not read through the thread entirely, but after two pages I am thoroughly convinced. For those who haven't read it, here is a basic summary of one argument against the existence of the Inversion Key:
1) There are only 76 quests, and there are players who have beaten all 76 quests.
2) From 1, there exists no quest for the Inversion Key.
3) Every key requires a quest.
4) From 2 and 3, there exists no Inversion Key.
(A very similar argument can be made by replacing "quest" with "family.")
