 Though some other scientists and mathematicians prior to Lorenz had examined such phenomena, these were basically isolated investigations never producing a recognizable, sustained field of inquiry as happened after the publication of Lorenz’s seminal paper. Sensitive dependence on initial conditions (SDIC) for some systems had already been identified by James Clerk Maxwell (1876, p. 13). He described such phenomena as being cases where the “physical axiom” that from like antecedents flow like consequences is violated. Like others Maxwell recognized this kind of behavior could be found in systems with a sufficiently large number of variables (possessing a sufficient level of complexity in this numerical sense). But he also argued that such sensitive dependence could happen the case of two spheres colliding (1860). Henri Poincaré (1913), on the other hand, later recognized that this same kind of behavior could be realized in systems with a small number of variables (simple systems exhibiting very complicated behavior). Pierre Duhem, relying on work by Hadamard and Poincaré, further articulated the practical consequences of SDIC for the scientist interested in deducing mathematically precise consequences from mathematical models (1982, pp. 138–142). 