Actually, you did lie. Multiple sources have confirmed it.
Via Townhall:
Q: If the President does not call it, label it a terrorist attack as you and others have, is there some legal or diplomatic trigger that that brings? Why hasn’t he said that?
MR. CARNEY: I think you’re misunderstanding something here. I’m the President’s spokesman. When the head of the National Counterterrorism Center, Matt Olsen, in open testimony in Congress answered a question by saying yes, by the definitions we go by — this is me paraphrasing — this was a terrorist attack — I echoed that, because this President, this administration, everybody looks to the intelligence community for the assessments on this. And it has been since I said so, the President’s position that this was a terrorist attack.
There are broader issues here that the President has addressed in answering questions, and he’s obviously interested in, as we all are, in waiting for the final result of an investigation. But let’s be clear about this. Every step of the way, the information that we have provided to you and the general public about the attack in Benghazi has been based on the best intelligence we’ve had and the assessments of our intelligence community. We have said all along that there’s an ongoing investigation and that as more facts come out, we will follow those facts wherever they lead and apprise you of our assessments as those facts come to light.