Most physicists accept the reality of space, time, and fields. If one accepts the reality of fields, it’s hard to see how one can reject the reality of quantized fields and thus the reality of various states of a quantum. A significant new argument emerged in 2012. Matthew Pusey and two colleagues proved that the epistemic interpretation of quantum states implies experimental predictions that contradict the predictions of standard quantum physics.14 Because scientists agree that the quantum predictions are correct, an interpretation that is inconsistent with those predictions is of no value.
