Quantum Gravity is the successful merging of the two.. Wave functions (or QM) and Spacetime. So it would be good to know how the two differs. They seem to have one thing in common.. they are both mathematical abstraction. But then someone said (Peterdonis): "Tidal gravity is not "just a math model". It's a physical observable. It is true that one is not *forced* to model tidal gravity using a curved spacetime; one could use another model. But in the context of that model, "spacetime curvature" is simply another name for "tidal gravity", so if tidal gravity is real (which it is), then spacetime curvature is real." Can we say the same thing to Wave Function? Can anyone give an example where or supply the analogy where: Tidal Gravity is to Spacetime Curvature XXX is to Wave function. Give an example of the XXX. Is there any?