Is the Surface Book actually Project Juggernaut Alpha?

[KevinM1]

During the last few months, as rumors were swirling around Microsoft's October event, there was one that claimed Microsoft had a project named Project Juggernaut Alpha. While most outlets speculated that it was in reference to an actual Surface-branded phone, I can't help but wonder that if Microsoft actually had a project with that name, it was actually referring to the Surface Book.

Do any insiders have any information re: Juggernaut Alpha vs. Surface Book vs. Surface phone?