 Scientific realists might point out that constructive empiricists do allow that explanatory power can count as a pragmatic virtue of a theory (van Fraassen 1980, 89). But, one might naturally think, no scientist can acknowledge the explanatory power of a theory without taking the theory to be true. So, continues the scientific realist, the constructive empiricist cannot admit the usefulness of explanatory power to the scientist without also regarding the scientist as taking her theories to be true.