[buro9]

I'd class adoption as the same family.

The title is correct because the title doesn't say "same bloodline for 1,300 years".

If you are arguing otherwise, feel free to tell all the adopted people out there that they really are not part of their respective families, and those who adopted others that the people they've adopted are just strangers in their homes.

[lmm]

Adopted and raised by those parents? Sure, same family.

"Adopted" when you're 40 and happen to be their top manager? Not so much.