What makes his suggestion interesting, in my opinion, is that it invokes a powerful intuition that the totality of the real, "substantial" world (the world of physical things) is ultimately indistinguishable from the void. That is, the substance of the world as a whole is identical with nothingness, and reality is interpreted as the realisation of Zero. This Zero, however, need not be interpreted as a number. Whether it is a number or not, it has more complexity, in this context, than has hitherto been imagined, for it includes the entire universe - indeed it is the "final result" of all the properties and processes of the universe. It is the ultimate emptiness of existence. Pearce sometimes uses terminology which reflects the fact that 0 is to be treated as a state of affairs rather than a number, when he says that his hypothesis is "that zero is the case".