"No??" Not that the point is in question; it's more that Sniper's not sure if she's setting up a rhetorical point or proposing a course of action. They're still off-balance, head above the rush but still being carried along. It's her anger—How tempting it is to plunge into that pure emotion, out of the spiral of their own calculations that had brought this plan to bear.

But they don't, with the same uncompromising self-control they had used to keep their arm perfectly still while they wrote.