Marsha Blackburn asked Ketanji Brown Jackson to define 'woman.' Science says there's no simple answer.

But Jordan-Young said she sees Jackson's answer, particularly the second half, reflecting the necessity of nuance. While traditional notions of sex and gender suggest a simple binary – if you are born with a penis, you are male and identify as a man and if you are born with a vagina, you are female and identify as a woman – the reality, gender experts say, is more complex.