Quantum mechanics means some black hole orbits are impossible to predict

Foreseeing the paths of three orbiting objects sometimes requires precision better than the quantum limit

illustration of orbiting black holes

For a trio of orbiting black holes (illustrated), even if their locations are known to the quantum limit, it’s not always possible to predict their future paths.

NASA, CXC, A. Hobart, T. Tibbitts

Even if you could measure three black holes’ locations as precisely as physically possible, you still might not know where the black holes would go.