[laughinghan]

Yes. I see you actually did understand that after all.

Are you calling it "muddy", then, because socioeconomic mobility exists? America's socioeconomic mobility is among the lowest of developed nations and getting worse since the 80s, but regardless, in order to even study such a thing requires defining it. Its definition is not muddy, it's widely accepted and studied.

I am genuinely happy for you that you were able to achieve it. I am incredibly grateful my parents were able to achieve it. But such achievements don't mean it's not still a problem.