Two Truths Two Lies - Insight and Ghosts of the Deep

Last year Savathun gave us these 4 statements for 2 truths and 2 lies:

- Savathun is in control of Io, Titan and Mercury

- The Witness returned Mars from the Void

- The Guardians will soon learn to move planets

- The Taken King will return

The first was obviously a lie. The second is unknown. The third is technically true if you count 3rd encounter of RoN as moving planets. Now my question is, did she think the fourth was going to be true because she knew about the plan in Ghosts of the Deep, or that her brood would eventually try this without her, or was that just a lie?

Savathun is very smart but she can't know the future, maybe she honestly thought it was going to work and that'd be one of the truths. It's not like these messages would be heard by anyone if she succeeded--it only makes sense if she loses, Oryx becomes their next best bet, and if it hadn't been for Sloan going whale watching we probably never would have caught that Hive Fireteam diving as fast as they could to the ocean floor. Alternatively she could have figured if we were strong enough to kill her reborn in the Light, we're the better bet than her own people, and thus it was always a lie and the Witness was the one who gave us Mars back. Or maybe RoN doesn't really count and both Mars and The Taken King were the true ones.

Thoughts?