Abstract It is usually attempted teleologically to demonstrate the rationality of the so?called scientific method. Goals or aims are posited (and their specification defended) and it is then argued that conformity with some body of methodological rules is conducive to the realization of these goals or aims. A ? deontological? alternative to this approach is offered, adapting insights of contemporary political philosophers, especially John Rawls and Bruce Ackerman. The ?circumstances of method? are defined as those circumstances in which it alone (...) makes sense to seek some method for the resolution of disputed issues. It is then shown that individuals who find themselves in these circumstances have reason to conduct themselves in conformity with certain simple rules of argumentation?have reason, indeed, in the very fact that they do so find themselves and altogether without reference to any goals or aims which it might be hoped to achieve. These rules require non?interference, responsiveness, relevance, and publicity, and are, arguably, the rules which define the concept (and which therefore provide a framework for various conceptions,) of scientific method. (shrink)