Board Thread:Questions and Answers/@comment-31625365-20170329135349/@comment-26377724-20171022234957

Why make 4 messages?

I think you should read what i wrote up there, suzuha make deductions from what she ear from kurisu and okabe.

When the timeline change the IBN is missing but suzuha at this moment doesn't know it's missing, for her point of view they didn't have it in the first place, so she didn't know if her mission is successful or not. So yes everyone forget that but they believe okabe.

And for the last message you forgot the attractor field convergence, she can't change the events enough to change the attractor field so it was pointless to told them (but she can't prevent herself to say some hints like kurisu is a spy) and i don't think she knows okabe and his ability to keep his memories. For her Okabe is the founder of the resistance and she is a simple member and never meet him before the time travel. It's on the contrary dangerous to change the life of the founder of the resistance don't you think?