“…Labov states, however, that any general view of language descent must be prepared to integrate the mechanisms of both TRANSMISSION and DIFFUSION, particularly when a well-defined speech community cannot be identified. For example, in western European dialectological studies (Auer and Hinskens 1996, Trudgill 1996, Kerswill 2003, the contrast between TRANSMISSION and DIFFUSION is said to be less prominent because these studies have generally identified the transfer of well-known features of older established dialects as the main linguistic phenomenon taking place: 'We rarely find reports of changes from below that depend on transmission through incrementation, as in the many new sound changes of North America' (Labov, 2007: 348 and DIFFUSION because, without a higher degree of abstraction, the preservation or loss of constaints on variation and change cannot be accurately identified (Labov, 2007: 348).…”