 Both the syntactic and semantic views of theories focus on the formal structure of theoretical bodies, and their “fit” with theorizing about chaotic dynamics seems quite problematic. In contrast, perhaps one should conceive of chaos theory in a more informal or paradigmatic way, say along the lines of Kuhn’s (1996) analysis of scientific paradigms. There is no emphasis on the precise structure of scientific theories in Kuhn’s picture of science. Rather, theories are cohesive, systematic bodies of knowledge defined mainly by the roles they play in normal science practice within a dominant paradigm. There is a very strong sense in literature about chaos that a “new paradigm” has emerged out of chaos research with its emphasis on unstable rather than stable behavior, on dynamical patterns rather than on mechanisms, on universal features (e.g., Feigenbaum’s number) rather than laws, and on qualitative understanding rather than on precise prediction. Whether or not chaotic dynamics represents a genuine scientific paradigm, the use of the term ‘chaos theory’ in much of the scientific and philosophical literature has the definite flavor of characterizing and understanding complex behavior rather than an emphasis on the formal structure of principles and hypotheses. 