Extensional specious presents are composed of ingredients that cannot possibly exist.

Still more recently, Pelczar has argued (2010a, 2010b) that the Extensional model rests on an inadequate conception of the temporal microstructure of consciousness. An Extensional specious present is a chunk of experiencing which extends over a second or so of ordinary time, so it will inevitably possesses temporal parts – the still briefer chunks of experiencing of which it is composed – and the briefest of these parts will be strictly momentary episodes of experiencing. Since on the Extensiona