> In other words, altering depictions of reality (ideas) do not
> produce any changes in the reality itself.
This Cartesian split is mystical or impossible. There is no way to alter an idea without altering the physical world. I thought you were rejecting Platonism, for which ideas don't need a physical world to exist. However, in this universe, when you change your mind, your brain circuitry and -- therefore -- your entire body (and, consequently, the physical world in which your body exists) also wind up altered.