Trying to pull free will out of electrons in the brain is the immediate challenge—can quantal effects bubble upward, amplify in their effects, so that they can influence gigantic things, like a single molecule, or a single neuron, or a single person’s moral beliefs? Nearly everyone thinking about the subject concludes that it cannot happen because, as we’ll soon cover, quantal effects get washed out, cancel each other out in the noise—the waves of superposition “decohere.”
