[…] few if any escape the taint of local and personal peculiarities of pronunciation and phraseology, peculiarities which, because more conspicuous than the others, are more often noticed by us and called dialectic.
- Whitney (1875), a pag.154-155

Every one of all these differences [differences of class, differences in grade of education, differences of age] is essentially dialectic: that is to say, they differ not at all in kind, but only in degree, from those which hold apart acknowledged dialects. They all fall, as regards their origin, under the classes of change already laid down: they are derivation from a former standard of speech which have hitherto acquired only a partial currency, within the limits of a class or district; or they are retentions of a former standard, which the generality of good speakers have now abandoned
- Whitney (1875), a pag.156