GRE General Test: RC-559958 GRE Reading Comprehension

The Gaelic revival movement of late 19th and early 20th century Ireland attracted some of the leading social, intellectual, and political figures of the time to the study of Gaelic. Primarily nationalistic in purpose, and located within the context of the Irish struggle for independence, the revival advocated the use of the traditional Irish language, Gaelic, in lieu of English. It was felt that a more robust use of a national language was necessary to crystallize Ireland's fractious sense of national identity. The idea was not without parallel; modern Israel rescued its traditional language, Hebrew, from what was exclusively academic and liturgical use, and reintroduced it into an active, living vernacular in the newly independent state of Israel. Prior to this unqualified success, however, was Ireland's attempted linguistic revival, which met with more debatable results. While many writers did incorporate Gaelic, and sometimes even write in it, English is still far more prevalent, except in isolated, rural areas on the western coast, and did not become the primary native language of subsequent generations. This arrestingly similar set of historical and cultural circumstances, coupled with different results, subverts the notion that language and cultural identity are inseparable. The writers and intellectuals that did study Gaelic did so primarily because it provided a romanticized connection to their heritage, not because they wished to integrate it into the fabric of their daily lives.
In the argument given, the two portions in boldface play which of the following roles?