 Russell’s focus on sensations, images, and percepts explains why Russell’s neutral monism has often been dismissed as a form of phenomenalism. But in the preceding section we have seen how Russell argued for the nonmentality of these items. Moreover this criticism overlooks that Russell worked with a vastly expanded set of construction materials. He allows for the enlargement of the realm of the known by a series of cautious  inferences.[4]  In a first step he argues that “all our percepts are composed of imperceptible parts” (Russell 1927a: 282); second, there are sensations, images, and percepts that are not our own; third, and most importantly, we can infer the existence of vast numbers of entities that “do not form part of any experience” (Russell 1921:  25).[5]  In this way Russell arrives at the view “that the world is very full of events” (Russell 1927a: 258), only a vanishingly small number of which are his own experiences.