Is the Non-rivalrousness of Intellectual Objects a Problem for the Moral Justification of Economic Rights to Intellectual Property?

It is often argued that the fact that intellectual objects-objects like ideas, inventions, concepts, and melodies-can be used by several people simultaneously makes intellectual property rights impossible or particularly difficult to morally justify. In this article, I assess the line of criticism of intellectual ownership in connection with a central category of intellectual property rights, economic rights to intellectual property. I maintain that it is unconvincing.