 As for point (iii), concerning the physical role of information: CA can accommodate a speculative hypothesis entertained by a number of scientists (Wheeler 1990, Ilachinski 2001) and philosophers (Chalmers 1996), namely that information is not just one aspect of the physical world, but, in a sense, the most fundamental. For instance, Fredkin’s Finite Nature Hypothesis not only stresses the importance of the informational aspects of physics, but “it insists that the informational aspects are all there is to physics at the most microscopic level” (see Fredkin 1993). 