Earlier quoted context omitted.
I am not a linguist, per se, but my understanding is that there is no formal definition (or even agreement) on what constitutes a separate language versus a separate dialect. Rather, a number of factors are taken into consideration (including political factors), and the distinction is almost always debatable. While it is desperate for citations, it looks like the Wikipedia article supports that: http://en.wikipedia.o…
The common analogy is that Chinese "dialects" are really different languages in the same Chinese language family (they have a common ancestor), the same way that Spanish, Portuguese, Italian, Corsican, Catalan, etc. are different languages in the Romance language family (their common ancestor is Latin). Where it gets confusing is when nationalism gets involved. Mandarin and Wu are different "dialects" of the same "la…
So, its a "ring language" (by analogy to a "ring species" [1] in biology.)