Thread:Zeldakasumi/@comment-27001444-20151014050645/@comment-26377724-20151014073420

I can answer myself some of it:

-This D-Mail is intercepted by Echelon and modify the future in a way that the past is also modified by the emergence of the time machine technology (the SERN modify the past after find out the first D-Mail in his automatic database) this D-Mail had a lot of consequencies like the crash on radio kaikan that cancelled the conference and definitely prevent Kurisu's death (in this attractor field).

-Because it's the effect of the attractor field convergence, if he doesn't trick himself and only trying to save kurisu without trick his past self (like the first attempt in episode 23), the attractor field convergence will force kurisu to die in order to allow the other Okabe to see her body in blood. For the second part I don't know why you ask the question, Kurisu only see him save her and want to thank him and the past okabe is replaced by the one we follow.

-He need to fail once in order to build his resolution, it's exactly the same reason of the two other questions, the convergence of the attraction field will not allow the future okabe to let okabe success in order to don't change the future that he build a time machine and a plan (Operation Skuld) to definitely save her.

-Exactly the R worldline is a line without Okabe and no other changes apart this one (that's why the divergence number doesn't change)

-Okabe can't see the difference between the past of this worldline and all the others lines, the kiss his enough to let him know the difference and stabilised his reading steiner.

-The last scene is a bit confusing you're right, if you listen carefully when he watch his phone you can hear the kurisu's voice: "Begin of operation Norn!". It's the kurisu's version of the operation Skuld in order to save Okabe, in other words it's a message from the future kurisu to take back okabe.