Orson Scott Card о шестой книге ГП

About the "murder": Dumbledore tells Draco that if he turns to the "good side" he can make it seem as if he died, so that Voldemort can't take vengeance on him.

Then, when Snape is about to cast the fatal spell, Dumbledore speaks to him pleadingly. This is, of course, pure theatre: Dumbledore is the quintessential Gryffindor, which means that courage is most important to him. He would not cower and whimper. He only acted that way to make it more convincing to the Death Eater witnesses, who would expect (and savor) such an attitude.
(...)
Snape is not a murderer; Dumbledore is not dead. Instead, they pulled off a scam to convince Voldemort absolutely that Dumbledore is dead and Snape is a loyal Death Eater. No one can doubt Snape now. Which means that Voldemort won't be looking for Dumbledore to oppose him any more, and he will hold Snape as his most trusted lieutenant.

So when Harry faces Voldemort in the final battle, he will not be alone.