  If we had a solution to the very basic problem about how the empiricist can get any content at all out of sensation, then the fourth proposal might show how the empiricist could explain false belief involving perception. The fifth and last proposal about how to explain the possibility of false belief attempts to remedy the fourth proposal’s incapacity—which Plato says refutes it, 196c5–7—to deal with cases of false belief involving no perception, such as false arithmetical beliefs. 