I've rewritten 4.4 for clarity since you left your original comment. Do you still think it needs improvement?
That sentence is still there so my comment still stands as far as I can tell. I can also tell I'm failing to convey it so maybe someone else can step in and explain it differently.
Thanks for putting in the work to write this FAQ.
I wrote a new Singularity FAQ for the Singularity Institute's website. Here it is. I'm sure it will evolve over time. Many thanks to those who helped me revise early drafts, especially Carl and Anna!