As for Corsican, a bone of contention is whether it should be considered an Italian dialect or its own language. Some scholars argue that Corsican belongs to the Centro-Southern Italian dialects and is closely related to Italy's Tuscan, if not reputed to be part thereof. Mutual intelligibility between Italian and the dialects of Corsican is in fact very high, with particular reference to the Northern varieties. Despite the geographical proximity, it has indeed been noted that the closest linguistic neighbour to Corsican is not Sardinian, which constitutes a separate group, but rather Tuscan and the extreme Southern Italian lects like Siculo-Calabrian.