“But this doesn’t make sense because we measure age by date of birth anyway!!!!” I’m aware of that. It’s almost as if legally defining life as beginning at conception is absurd given that we measure age, child support, tax status, government benefits, etc. by date of birth
It was more of a sarcastic rhetorical question, but why would the premise be stupid if it actually was a legal question? There are several states where life is defined as beginning at the moment of conception; in those states, would this baby legally be considered a grown man?