Unfortunately I can't tell who's right or wrong in this.
I think they're both protecting their ego. They are probably flaws in both ideas.
It's some pretty advance stuff, so we can only speculate. The discussion seems to revolve around theories. So I guess the best thing to do is to implement and see how things work out.
Hear hear, they're both dedicated to the project so it doesn't matter, they will make it work regardless of who's right or wrong currently.