DOCTOR: I’ve seen Slake and the others now. They don’t deserve to be kept alive. Not at the cost of other’s suffering and death.

SAM: Isn’t that my line?

DOCTOR: Of course, you were right.

SAM: But what about all that stuff you were saying, about everyone having the right to live-

DOCTOR: Oh, that’s right as well.

HARRIS: But they completely contradict each other?

DOCTOR: You’re right too. Now all you need to do is figure out how we can all be right at the same time, then you’ll have it.