[A. Pole]

Of that knowledge I - by virtue of being born and growing up there - claim sufficiency.

Hmm, this is strange if you are Russian, how come that you could improve yourself so much :) How do I know that you are not a homo sovieticus and "kagebun" even now?

If the leopard cannot change its spots, why should YOU?

[GSlob]

I am not a genetic russian, glory be. But I was born and grew up there, and claim sufficient knowledge of the place's sociology, culture and history, native proficiency and absolute literacy in language [including complex - and very complex - grammar] etc. And as for "how I managed to improve myself so much" - it took dedicated and concentrated effort to accomplish the transcivilizing. "Dostigaetsya uprazhneniem", as one Myshlaevsky used to say.