Some Remarks on Wave Function Monism

Is wave function monism, the view that the wave function completely describes physical objects, a sensible view? GRW, one candidate to solve the measurement problem, might be taken to be an example of such view. I argue in this paper that it not so obviously so. I first show that a bare version of wave function monism is impossible, and even if one can construct monistic theories with additional rules (but no additional ontologies), they are not to be taken seriously. Instead, a preferable choice is that of a quantum theory in which physical objects are represented by entities in three–dimensional space or in four-dimensional space-time