User blog comment:The Milkman/The Writing of the Ending/@comment-24174486-20120726200543/@comment-5337704-20120822120600

I agree with the above, it is more surprising to me that Hackett went along with the "Ah, I dont know what it is, but build it" story. But everyone "thought" it was a weapon, it was used to activate the AI (cruicible). Shepard did something no other race prior to the current one accomplished. The AI has to use a new equation since the one that he has now is defunct. Oddly the AI is humble enough to ask Shepard for the next course of action.