Changes

This theorem explains why all substantive methods are necessarily dynamic. Starting from fallibilism -as all propositions with empirical content are by definition both contingent and fallible- and taking into account that all substantive methods are based on such propositions, they cannot be immune to change. From thus, from a conjunction of : 1. fallibilism, 2. the premise that the rejection of theories can lead to the rejection of methods and 3. the Synchronism of Method Rejection Theorem (derived in turn from the Method Rejection Theorem and the Third Law) , it follows that all substantive methods are necessarily dynamic.