Final answer:
Non-binary is not a relatively new identity and has existed throughout history.
Step-by-step explanation:
False, non-binary is not a relatively new identity that wasn't known until the past century. Non-binary gender identities have existed throughout history, across cultures and societies. Non-binary individuals do not identify strictly as male or female, and may identify as both, neither, or a different gender altogether.
Learn more about Non-binary gender identity