Ah, but when that line of tiny change is so arbitrary… Is it a true chicken until it grows up and fulfils its destiny? Is it a chicken based purely on its genetic code, so the egg whence it hatched is a chicken egg; or is it truly a chicken when it becomes a chicken… meh, I write this far and find I still agree with you: even in that case the egg it hatched from becomes a chicken egg by virtue of the chicken it grew into.