Answer: There are two types of evidence that can be used to support the rebuttal: Statistics about the number of books written by past recipients of the Nobel Prize in Literature and a quotation by a literary scholar explaining why Dylan's lyrics are not poetry.
Explanation: As the rebuttal consists in questioning the prize awarded to Dylan due to the lyrics of his songs, the best way of supporting this rebuttal would be providing information about the number of books that previous Nobel prize winners actually published in order to contrast this number with the number of books that Dylan wrote, which were very few. Statistics would also function to prove that this prize has always been awarded to authors for their books and not for their lyrics. Furthermore, a quotation by a literary scholar explaining why Dylan's lyrics are not poetry would also be very useful in order to establish a distinction between poetry and music, two types of art that involve different processes.