This has evolved now into what's named self-organised criticality? Well, it is substantially different because criticality goes beyond what I had in mind. In fact, I think perhaps it goes beyond what is necessary. I have not made up my mind on self-organised criticality, because the characteristic of the question of magnets is that there is a parameter like temperature. At a certain critical temperature very special things happen. The characteristic of phenomena like prices or like turbulence, there's no parameter. Therefore to embed a prime without a parameter in one which has a parameter, and then argue that this parameter somehow arranges to take its own value is presupposing something that is beyond reality. I mean there are no non-critical situations. So I have not made up my mind about the power of this metaphor. The idea that dependence can be global, that variance can be infinite, and in fact that everything that has been taken as finite without any question in physics or in statistics can, in fact be divergent or zero which is sometimes equally bad or equally rich in consequences. This idea is something that did not depend upon any broader conjecture about the causes of these phenomena. It comes out of efforts to describe them and has been made unavoidable by those efforts.