A formulational debate is a debate over whether certain definitions of scientific realism and antirealism are useful. By contrast, an epistemological debate is a debate over whether we have sufficient evidence for scientific realism and antirealism, defined in a certain manner. I argue that Hilary Putnam's definitions of scientific realism and antirealism are more useful than Bas van Fraassen's definitions of scientific realism and constructive empiricism because Putnam's definitions can

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... e both formulational and epistemological debates, whereas van Fraassen's can generate only formulational debates.