Linguist: One group of art critics claims that postimpressionist paintings are not really art and so should be neither studied nor displayed.
Main Conclusion
Their disagreement is not over the meaning of the word “art.”
Intermediate Conclusion
[There are paintings that] should be ignored in the manner suggested by the first group
Premise
The second group grants that there are paintings that are not works of art.
No Role
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