The cost of closure: logical realism, anti-exceptionalism, and theoretical equivalence

Philosophers of science often assume that logically equivalent theories are theoretically equivalent. I argue two theses, anti-exceptionalism about logic (which says, roughly, is not a priori, it revisable, and special or set apart from other human inquiry) logical realism differences in reflect genuine metaphysical the world) make trouble for this commitment, as well closely related commitment to being closed under consequence. provide three arguments. The first show provides an epistemic challenge both closure equivalence claims; third shows claims. Along way, there important methodological upshots metaphysicians philosophers logic, particular, lessons certain conceptions naturalism constraining possibilities metaphysics philosophy logic.