See https://en.wikipedia.org/wiki/Singular_they https://en.wikipedia.org/wiki/Singular_they for more information. It's been around since the 1300's but it's onl

See https://en.wikipedia.org/wiki/Singular_they https://en.wikipedia.org/wiki/Singular_they for more information. It's been around since the 1300's but it's only gone into the mainstream as someone to refer to direct people fairly recently.