The edits posted by the anonymous contributor (21:53, 22 May 2007, 24.91.215.12) helped to improve the language and grammatical flow, but affected the structural consistency that is found in the book, which will be more important in this volume due to the alpha and beta situations.
one good example would be the way the second paragraph is phrased, which is totally similar in alpha and beta except
Spoiler! :
the [AN: WTF?] left by the contributor is much uncalled for as well. I suppose it is the unknown caller's love for Math since the younger sister seemed to be talking about Math with the caller (or Sasaki), as can be seen from beta-1. thus my point about editing.
hope I dont come across as offensive. I am just somewhat disturbed by the WTF comment. no hard feelings.