Really, the only thing she'd refused to do in session or while talking to the Princesses privately was to speculate on the strategy of the human ambassadors, who would be coming soon enough, or to speculate on whether humans would wage war with the ponies if they refused to allow the evacuation. She didn't bother explaining that the humans would come regardless of the pony's wishes; Celestia and Luna already knew that, but if they'd decided not to tell their counselors and ministers, then it wasn't her place to do so for them. And, in any case, she didn't know what the plan was, and she wasn't about to guess. 