But the question is, is a chicken egg an egg containing a chicken or an egg which was laid by a chicken?
(lemmy.dbzer0.com)
That depends on how you define chicken egg. The egg that hatched to a chicken predates the chicken which predates the egg laid by a chicken. The first egg from which a chicken hatched was from a bird almost but not quite a chicken and you'd probably be completely incapable of drawing a line at which generation it is and successfully defending that decision