Singular they is the use in English of the pronoun they or its inflected or derivative forms, them, their, theirs, and themselves (or themself), as an epicene (gender-neutral) singular pronoun. It typically occurs with an antecedent of indeterminate gender, as in sentences such as: "Somebody left their umbrella in the office. Would they please collect it?" "The patient should be told at the outset how much they will be required to pay." "But a journalist should not be forced to reveal their sources." The singular they had emerged by the 14th century. Though it is commonly employed in everyday English...