Abstract

Hilary Putnam's doctrine of conceptual relativity sustains that there are many different incompatible, yet equivalent, descriptions of what have to be considered "the same" phenomena. This fact is reason to justify the idea that metaphysical realism is wrong and that a better general view of reality should be something like a "pragmatic realism." Putnam sustains further that the different incompatible and equivalent descriptions have to bear the same explanatory virtue. Here it is contended that there seems to be difficulties in construing this requirement in a non-question begging way in an argument designed to show that metaphysical realism should be dismissed. Different descriptions can only be deemed to have the same explanative virtue if our knowledge of, for example, structures in the natural world, seems to be simply a form to "save the phenomena," but this is a characteristic anti-realist thesis that should not be taken for granted in the dialectical setting.