1/ Author's a dude. 2/ The singular (gender-neutral) they has existed since the 13th century in informal contexts (https://en.wikipedia.org/wiki/Singular_they h

1/ Author's a dude. 2/ The singular (gender-neutral) they has existed since the 13th century in informal contexts (https://en.wikipedia.org/wiki/Singular_they https://en.wikipedia.org/wiki/Singular_they). Just use that.