Linguist: One group of art critics claims that postimpressionist paintings are not really art and so should be neither studied nor displayed. Another group of critics disagrees, insisting that these paintings are works of art. But since the second group grants that there are paintings that are not works of art and should ttherefore be ignored in the manner suggested by the first group, their disagreement is not over the meaning of the word art. 
 The claim that there are paintings that are not works of art plays the role of being a claim whose acceptance by critics who differ on other issues is cited by the argument as evidence of its truth in the linguist's argument.