> I understand "their" as a plural Singular "they" has been in use in English for centuries. See https://en.wikipedia.org/wiki/Singular_they https://en.wikiped

> I understand "their" as a plural Singular "they" has been in use in English for centuries. See https://en.wikipedia.org/wiki/Singular_they https://en.wikipedia.org/wiki/Singular_they or https://www.merriam-webster.com/words-at-play/singular-nonbinary-they https://www.merriam-webster.com/words-at-play/singular-nonbi... for example.