This affects, for example, science-fiction authors writing about AIs or hermaphroditic aliens (which don't have a sex), or mystery authors writing about a crime suspect whose identity (and therefore, sex) is unknown. In these cases, _she_ or _he_ are inappropriate, but the English language offers no alternative lacking its own downsides: _it_ is understood to refer to non-persons, _they_ gets conjugated as a plural, and neopronouns like [_ey/em/eir_](https://en.wikipedia.org/wiki/Spivak_pronoun)—or [_ve/ver/vis_](http://www.urticator.net/essay/0/30.html), as used in some of [Yudkowsky's juvenilia](https://intelligence.org/files/CFAI.pdf)—are hard to rally adoption for because pronouns are a [closed class](https://en.wikipedia.org/wiki/Part_of_speech#Open_and_closed_classes)—not something people are used to new members of being coined, in the way that people are used to seeing unfamiliar nouns, adjectives, or verbs.
This affects, for example, science-fiction authors writing about AIs or hermaphroditic aliens (which don't have a sex), or mystery authors writing about a crime suspect whose identity (and therefore, sex) is unknown. In these cases, _she_ or _he_ are inappropriate, but the English language offers no alternative lacking its own downsides: _it_ is understood to refer to non-persons, _they_ gets conjugated as a plural, and neopronouns like [_ey/em/eir_](https://en.wikipedia.org/wiki/Spivak_pronoun)—or [_ve/ver/vis_](http://www.urticator.net/essay/0/30.html), as used in some of [Yudkowsky's juvenilia](https://intelligence.org/files/CFAI.pdf)—are hard to rally adoption for because pronouns are a [closed class](https://en.wikipedia.org/wiki/Part_of_speech#Open_and_closed_classes)—not something people are used to new members of being coined, in the way that people are used to seeing unfamiliar nouns, adjectives, or verbs.