Singular they

"Singular they" is a popular, non-technical term for the use of the pronoun they (or its inflected forms) when plurality is not required by the context. "Singular" they may refer either to a single person whose sex is unknown or not specified (e.g. "This student failed their exams"), or to an indeterminate number of people (e.g. "Anyone who thinks they have been affected should contact their doctor"). In the latter sentence, they and their are generic, non-referring pronouns (technically, anaphora) within the scope of a universal, distributive quantifier denoted by anyone. Such uses of they replace the historically preferred method of using of the masculine singular pronoun, he.

Though "singular they" is widespread in everyday English and has a long history of usage, debate continues about its correctness. The Chicago Manual of Style notes:

On the one hand, it is unacceptable to a great many reasonable readers to use the generic masculine pronoun (he in reference to no one in particular). On the other hand, it is unacceptable to a great many readers either to resort to nontraditional gimmicks to avoid the generic masculine (by using he/she or s/he, for example) or to use they as a kind of singular pronoun. Either way, credibility is lost with some readers.

With the 14th edition (1993), the Manual briefly revised their neutral stance to actually recommend "singular use of they and their", noting a "revival" of this usage and citing "its venerable use by such writers as Addison, Austen, Chesterfield, Fielding, Ruskin, Scott, and Shakespeare." However, regret regarding that printing is expressed at their website; and with the current 15th edition (2003), they have returned to their original neutral position.

"Singular" they does, in fact, remain morphologically and syntactically plural (it still takes plural forms of verbs). Talmy Givón (Syntax: an introduction, 2001) even claims "If anybody did that, they'd be insane" as an example of non-referring, plural anaphoric they, although it is indistinguishable from the singular form ("If anybody did that, he'd/she'd be insane"). However, "singular" they is more often considered to be semantically indeterminate in number, as well as in gender; and the usage is described as generic they or epicene they.

Summary

Generic they has indeterminate number:

• There's not a man I meet but doth salute me / As if I were their well-acquainted friend — Shakespeare, The Comedy of Errors, Act IV, Scene 3 (1594)

(Their can be understood equally well as referring to each man considered one at a time, or to all of them collectively.)

Epicene they has indeterminate gender:

• "It can't be true what the girls at the Rectory said, that her mother was an opera-dancer—"
  "A person can't help their birth," Rosalind replied with great liberality. — Thackeray, Vanity Fair (1848)

(The relevant person here is Becky Sharp. Thackeray has Rosalind using their as a polite circumlocution, perhaps avoiding the directness of she ... her, and generic his in a context involving only women.)

In neither case is "singular" they unambiguously a semantic or morpho-syntactic singular. What it actually agrees with is the plurality implicit in the indeterminacy of generic antecedents.

This is explained by David Lewis' analysis of an aspect of the logic of the semantics of natural language, now called quantificational variability effect (QVE). Broader research in the area is still active, under the name donkey pronouns.

In this kind of analysis, "singular" they in English is typically an example of a semantically bound variable, rather than a simple referential pronoun. It is most clearly evident in the special case of distributive constructions, where the preference many languages show for singular pronouns probably gives rise to the singular in "singular they".

Steven Pinker proposes the word they be considered to be a pair of "homonyms" — two different words with the same spelling and sound.

• Those ladies over there are wearing THEIR[1] best clothes. [definite, plural, referring pronoun]
• On a day like today, anyone would want to wear THEIR[2] best clothes. [indefinite, generic and epicene, non-referring anaphor]

This would be analogous to a language like Basque, which uses the word nork both as an indeterminate pronoun meaning "who" and also as a marker in distributive constructions.

Basque has two ways of expressing universal distributive quantifications: (i) lexically, through the quantifier bakoitz 'each'; (ii) configurationally, through the construction exemplified in (1).

(1)	Nork/zeinek	bere	ama	ikusi	du
	who-erg/which-erg	his/her	mother	seen	has
	'Everyone saw his/her mother'

In (1), an indeterminate pronoun takes on a universal distributive value. Such a value is not a lexical property of the relevant indeterminate pronouns.

Basque is far from the only example of this. Kuroda considers it typical of East Asian languages, Japanese and Korean in particular. Yet other languages have even more particular ways of expressing distribution and quantification. Sumerian, structurally similar to Basque, uses a nominal suffix, dedli, to indicate "each individual".

Technical terms

Distribution

Distribution involves both singularities and pluralities.

Distributive constructions apply a single idea to multiple members of a category, hence involving both singularities (the idea, the category, each individual member, and the relation of idea to member) and pluralities (the members and the repeated relation). They are typically marked in English by words like each, every and any. The simplest examples are applied to groups of two, and use words like either and or—"Would you like tea or coffee" (you like distributed over tea and coffee). Thorough analysis of distribution requires treatment of negation. Hence, the Shakespeare quote above is semantically distributive, because there's not a man who... is logically equivalent to every man does not.... Since distributive constructions apply an idea relevant to each individual in the group, rather than to the group as a whole, they are most often conceived of as singular, and a singular pronoun is used.

• England expects that every man will do his duty. — Nelson (1806)
• Every dog hath his day.

— John Ray, A Collection of English Proverbs, 1670

originally from Plutarch, Moralia, c. 95 AD, regarding the death of Euripides

However, English is typical as many languages show ambivalence in this regard. Because distribution also requires a group with more than one member, plural forms are sometimes used. The Shakespeare quote is probably an example of such a usage. The alternative would be that he intended epicene they in agreement with generic man, including women.

Many clear examples of the plural being used in other languages, and coming into English by translation, are found in the King James Version (KJV) of the Bible, which attempted to be very literal. For example, Philippians 2:3 has a plural pronoun (ἑαυτῶν) in the Greek, rendered "themselves" in the KJV. The fact that singular forms are, nonetheless, more natural in distributive constructions is inadvertently demonstrated by websites that, not having access to the original languages in these cases, assume singular interpretations of they in what are actually translations of plurals.

English is typical among many languages because it forms distributives with pronouns and marks for singular and plural. Such languages demonstrate a preference for singular pronouns but attest plurals in a substantial minority of cases. Both forms being comprehensible to native speakers, usage depends on context, clarity, style and logic (for logic, see below).

Strunk and White's The Elements of Style notes both uses.

A common inaccuracy is the use of the plural pronoun when the antecedent is a distributive expression such as each, each one, everybody, every one, many a man, which, though implying more than one person, requires the pronoun to be in the singular. Similar to this, but with even less justification, is the use of the plural pronoun with the antecedent anybody, any one, somebody, some one, the intention being either to avoid the awkward he or she, or to avoid committing oneself to either. Some bashful speakers even say, A friend of mine told me that they ...

This is a semantic assessment (note the words "inaccuracy", "implying", "requires", "justification" and "intention"), rather than a syntactic linguistic prescription (as some have, rather loosely, claimed). Prescriptions of taste are not true or false, so they cannot be proven right or wrong; however, claims regarding accuracy can be demonstrated to be true or false. Strunk and White have been proven wrong on this point by logical analysis of quantification in natural language (like Pinker following Lewis and others above) — distributive expressions are neither exclusively singular nor exclusively plural, they are typically indeterminate in number.

Quantification

File:Quantification.svg

Quantification refines the idea of distribution.
A generic property in mathematics
is one that holds in "almost all" cases.

The simplest examples of quantification are existential and universal statements, which are marked in English by phrases like there is or words like all. However, there are different types of quantification marked by other words like many, more and most. Quantification is also apparent in language referring to time, marked by words like always, often, sometimes, once or never. Apart from the quantifiers which refer to a unique singularity, like there is and once, they necessarily imply a distributive concept: multiple similar things. Even in the case of there is and once, logical analysis views many of these as distributive statements equivalent to, out of all cases there is at least one. Hence literature seeking to explain quantification in natural language (λx in Montague grammar) often refers to distributive constructions, and vice versa.

Variables

The term variable arises due to the interest mathematicians, logicians, philosophers of language, theoretical linguists and computer language designers have in formal language representations of natural language. In their metalanguage, quantifiers are applied over the "domain" (or "restriction") of a variable. Where natural language speakers use words or clitics to signal generalizations, language analysts define what they call variables that range over any element of the set of members of a group — the domain. Consider the examples of

• natural language — Every good boy deserves fruit; and
• formal language — $\forall b\in B,b.G\Rightarrow b.Df.$

To be is to be the value of a bound variable.

— Quine, 'On What There Is', 1948

The symbol, b, is used to represent a variable that can refer to any boy (the elements of the set of all boys, B). The upside-down A is a standard symbol for the universal quantifier — for all, for each or for every in natural language. In predicate logic, the truth-value of the proposition expressed above in a formal language does not depend on the particular value of the variable, b. This matches our natural language understanding. Whether or not every good boy deserves fruit doesn't depend on any particular boy. Because the truth-value of the proposition doesn't depend on the value of the variable, the variable is called bound. If, however, there is no quantifier, the variable is called free, and the truth-value of the proposition depends on the value of the variable. This also matches natural language. Whether Adam is bad or deserves fruit depends on Adam.

The concept of free and bound variables arose in logic well before Quine discussed its relevance to the English language. Although the distinction may seem technical to native speakers of many languages, it is quite the reverse among the 250 or so autochthonous Australian languages. RMW Dixon describes how, historically, Australian languages show evidence of nouns inflecting on ergative, and bound pronouns on accusative patterns. Only later did free pronouns enter common usage, and then only sparingly, for emphasis. Gradually, the free pronouns shifted from accusative inflection to ergative, since they have come to be perceived by speakers as a special kind of proper name. Dixon offers the Warlpiri language as a representative example.

Two kinds of pronoun:
referring (Y, constant, it) and non-referring (x, variable, they)

Pinker argues that usage of "singular" they in English cannot be condemned on grammatical grounds, because it is probably better understood as a linguistic marker of a bound variable rather than as a pronoun with a referent. "On logical grounds, then, variables are not the same thing as the more familiar 'referential' pronouns that trigger number agreement." He gives the following example.

Everyone returned to their seats means 'For all X, X returned to X's seat.' The 'X' does not refer to any particular person or group of people. ... The their there ... refers neither to one thing nor to many things; it does not refer at all. Everyone and they are not an 'antecedent' and a 'pronoun' .... They are a 'quantifier' and a 'bound variable,' a different logical relationship.

Pinker's example demonstrates the acceptability of plural forms in distributive constructions:

• plural they — Everyone returned to their seats.

However, additional issues are raised by the attested usage of the logically equivalent alternative constructions of this distributive expression, using:

• generic they — Everyone returned to their seat, or
• generic he — Everyone returned to his seat.

Usage

Generic he

In the previous diagram, the circles (plural) ARE called X.
Any (generic) one (singular) of the circles (plural) IS called x.
One specific circle (singular) IS called Y.
English generally prefers to cast generics as singular.

Until the late twentieth century, generic use of the pronoun he was preferred (but not required) in such constructions, as described in contemporary grammar books. For example, an 1896 grammar notes:

410. ... when the antecedent includes both masculine and feminine, or is a distributive word, taking in each of many persons,—the preferred method is to put the pronoun following in the masculine singular; if the antecedent is neuter, preceded by a distributive, the pronoun will be neuter singular.

Examples of generic he

• Every person who turns this page has his own little diary. — Thackeray
• Suppose the life and fortune of every one of us would depend on his winning or losing a game of chess. — Thomas Huxley, 'A Liberal Education' (1868)
• If any one did not know it, it was his own fault. — George Washington Cable, Old Creole Days (1879)
• Everyone has the right of equal access to public service in his country. — Universal Declaration of Human Rights (1948)
• It wouldn't be as if the lone astronaut would be completely by himself. — Nancy Atkinson, 'A One Way One Person Mission to Mars' (4 March 2008)
• Kitchen table issues ... are ones the next president can actually do something about if he actually cares about it. — Hillary Rodham Clinton, presidential campaign rally (12 May 2008)

Generic he is still current English usage, though the gender neutral language movement discourages this use.

Generic they

Generic he has been a preference in usage, not a binding grammatical "rule", as Thackeray's use of both forms demonstrates. "The alternative to the masculine generic with the longest and most distinguished history in English is the third-person plural pronoun. Recognized writers have used they, them, themselves, and their to refer to singular nouns such as one, a person, an individual, and each since the 1300s."

Examples of generic they

• Eche of theym sholde ... make theymselfe redy. — Caxton, Sonnes of Aymon (c. 1489)
• Arise; one knocks. / ... / Hark, how they knock! — Shakespeare, Romeo and Juliet
• 'Tis meet that some more audience than a mother, since nature makes them partial, should o'erhear the speech. — Shakespeare, Hamlet
• I would have everybody marry if they can do it properly. — Austen, Mansfield Park (1814)
• That's always your way, Maim—always sailing in to help somebody before they're hurt. — Mark Twain, Adventures of Huckleberry Finn (1884)
• Caesar: "No, Cleopatra. No man goes to battle to be killed." / Cleopatra: "But they do get killed". — Shaw, Caesar and Cleopatra (1901)

File:TypicalStudent.jpg

Which of these students is the singularly typical one?
"The typical student" is generic not specific reference.
82% of the AHD Usage Panel rejected
"the typical student ... they".

Of the example from Shaw, the Merriam-Webster Dictionary of English Usage (1989) states: "It would be a violation of English idiom to use a singular pronoun in [that] sentence (But he does get killed) on the assumption that because no man is singular in form and governs a singular verb, it must take a singular pronoun in reference. Notional agreement is in control, and its dictates must be followed." In other words, no man is syntactically singular, demonstrated by taking the singular form goes; however, it is semantically plural (all go [to kill] not to be killed), hence idiomatically requiring generic or plural (not singular) they.

A majority of The American Heritage Dictionary of the English Language usage panel "of some 200 distinguished educators, writers, and public speakers" "reject the use of they with singular antecedents" inasmuch as 82% of the panelists found the sentence "The typical student in the program takes about six years to complete their course work" to be unacceptable.

Study has also shown that reading time of they increases significantly when used with a gender-determinate antecedent, suggesting that such use can confuse.

Both generic he and generic they have long histories of use, and both are still used. However, both are also systematically avoided by particular groups. Style guides that avoid expressing a preference for either approach recommend recasting generic expressions as plurals to avoid the criticisms of either party.

Irrespective of the debate, when used, generic they can be seen to have an implication of indefinite reference (indefinite number or indefinite gender). It is most commonly used with indefinite referents of a distributive nature such as someone, anyone, everyone, and no one. Such references are not to one particular person but to a large group taken one at a time, causing influence from the implied plural.

Grammatical analysis

According to the traditional analysis, English personal pronouns are typically used to refer backward or forward within a sentence to a noun phrase (which may be a simple noun).

Inflected forms

	Nominative (subject)	Accusative (object)	Prenominal possessive	Predicative possessive	Reflexive
He	He laughs.	I hug him.	His hair grows.	I use his.	He feeds himself.
She	She laughs.	I hug her.	Her hair grows.	I use hers.	She feeds herself.
Prototypical they	When my kids watch "The Simpsons", they laugh.	Whether they win or lose, I hug them.	As long as people live, their hair grows.	Most of my friends have cell phones, so I use theirs.	The children feed themselves.
Singular they	When I tell someone a joke they laugh.	When I greet a friend I hug them.	When someone does not get a haircut, their hair grows long.	If my mobile phone runs out of power, a friend that I am with lets me borrow theirs.	Each child feeds themself.
Generic he	When I tell someone a joke he laughs.	When I greet a friend I hug him.	When someone does not get a haircut, his hair grows long.	If my mobile phone runs out of power, a friend that I am with lets me borrow his.	Each child feeds himself.

Plural

• All good students do their homework.

Generic (indeterminate number)

• A good student is known for doing his homework OR
• A good student is known for doing their homework (widely prescribed in gender-neutral style guides)

Singular

• Mary is known for doing her homework

In the middle two of these example sentences, traditional grammars speak of the pronoun referring to a good student. However, following analysis by Quine, writers like Lewis (above) understand structures involving generic antecedents to be a logically distinct class. Pinker notes the pronouns are not in fact referring to anything in particular. Geoffrey Pullum uses the logical, rather than grammatical, term bound variable to describe such expressions.

Irrespective of how such cases are explained grammatically, however, both are well-formed English sentences. Both are attested in English literature prior to the 20th century, and both are still attested in 21st century English.

Singular they, although morphologically a plural pronoun, is often used in those circumstances when an indefinite number is signified by an indefinite singular antecedent; for example,

• The person you mentioned, are they coming?, not *… is they coming?

This is analogous to the pronoun you, which originally was only plural, but by about 1700 replaced thou for singular referents, while retaining the plural verb form. Some uses of singular they follow a grammatical rule whereby singular indefinite antecedents (such as everyone, anyone, no one, and all) are followed by a coordinate or independent clause containing the plural pronoun 'they'. The plural reflexive form themselves is used as well; with some speakers using the singular form themself, in particular with semantically singular they.

Even when the gender is known, they is sometimes found with a generic referent. For example: "A teenage boy rarely thinks about their future." A teenage boy rarely thinks about his future is more likely in formal writing.

Many other modern uses follow the prescription of gender-neutral English in the style manuals of various organizations. As the syntactically singular third-person pronouns of English are all either gender-specific (he and she) or inappropriate for reference to people (it), singular they is also often used where the sex of the referent is either unknown or irrelevant:

• A child becomes an adult when they turn 18.
• Someone called for you, but they did not leave a message.

Gender-neutral language movement

In the late 20th century, the feminist movement expressed concern regarding the use of generic he in the English language. The feminist claim was that such usage contributes to an assumption that maleness is "standard," and that femaleness is "different". They also claimed that such use is misogynistic. One response to this was an increase in the use of generic she in academic journal articles from around this time. However, the more common response has been prescriptive, with many institutions publishing gender neutral style guides, notably in government, academia and publishing. For example, The Cambridge Guide to English Usage (2004) expresses several preferences. "Generic/universal their provides a gender-free pronoun, avoiding the exclusive his and the clumsy his/her."

It avoids gratuitous sexism and gives the statement broadest reference....They, them, their are now freely used in agreement with singular indefinite pronouns and determiners, those with universal implications such as any(one), every(one), no(one), as well as each and some(one), whose reference is often more individual....For those listening or reading, it has become unremarkable--an element of common usage.

The use of masculine generic nouns and pronouns in written and spoken language has decreased since the 1960s. In a corpus of spontaneous speech collected in Australia in the 1990s, singular they had become the most frequently used generic pronoun. The increased usage of singular they may be at least partly due to an increasing desire for gender-neutral language; while writers a hundred years ago might have had no qualm using he with a referent of indeterminate gender, writers today often feel uncomfortable with this. One solution in formal writing has often been to write he or she, or something similar, but this is considered awkward when used excessively, overly politically correct, or both.

In certain contexts, singular they may sound less obtrusive and more natural than generic he, or he or she. One guide offered the following example:

Nobody in their right mind would do a thing like that.

Some grammar and usage guides have accepted singular uses of they, in cases limited to references to an indeterminate person. For example, A person might find themself in a fix is considered standard English, but not *Dr. Brown might find themself in a fix. For the latter, the most usual circumlocutions are: recasting the sentence in the plural (Doctors might find themselves...), second person (If you're a doctor, you might find yourself...'), or sometimes reflexive (One might find oneself …). Singular they is occasionally used to refer to an indeterminate person whose gender is known, as in No mother should be forced to testify against their child.

Some grammarians (e.g., Fowler 1992, pp. 300–301) continue to view singular they as grammatically inconsistent, and recommend either recasting in the plural or avoiding the pronoun altogether. Others say that there is no sufficient reason not to extend singular they to include specific people of unknown gender, as well as to transgender, bigender, intersexual and androgyne people, and those who do not identify exclusively with either gender.

Some manuals of style remain neutral on the subject while other style manuals explicitly reject the use of the singular they in grammar. According to the Publication Manual of the American Psychological Society, a pronoun must agree in both gender and number with the noun it replaces. The APA manual offers the following example as incorrect usage:

Neither the highest scorer nor the lowest scorer in the group had any doubt about their competence.

while also specifically taking a stand that generic he is unacceptable (p. 66). The APA recommends using "he or she," recasting the sentence with a plural subject to allow correct use of "they," or simply rewriting the sentence to avoid issues with gender or number.

The Purdue Online Writing Lab (OWL) also maintains that pronouns must agree in number, and that the singular they is incorrect usage.

Current debate relates to not only grammar but also to wider questions of political correctness and equal rights, and in particular, the extent to which language influences thought.

See also

• Bound variable pronoun
• Gender-neutral language in English
• Gender-neutral pronoun

References

• Balhorn, Mark (2004). "The Rise of Epicene They". Journal of English Linguistics. 32 (2). SAGE Publications: 79–104. doi:10.1177/0075424204265824.
• Baranowski, M. (2002). "Current usage of the epicene pronoun in written English". Journal of Sociolinguistics. 6 (3): 378–397. doi:10.1111/1467-9481.00193. {{cite journal}}: Unknown parameter |month= ignored (help)
• Baskervill, W. M. (1896). "An English Grammar". Retrieved 2007-07-09. {{cite web}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Brasoveanu, Adrian (2008). "Donkey pluralities: plural information states versus non-atomic individuals". Linguistics and Philosophy. 31 (2): 129–209. doi:10.1007/s10988-008-9035-0. {{cite journal}}: Unknown parameter |month= ignored (help)
• Fodor, Janet Dean (1982). "Referential and Quantificational Indefinites". Journal Linguistics and Philosophy. 5 (3). Springer Netherlands: 355–398. doi:10.1007/BF00351459. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Fowler, Henry Ramsey (1992). The Little, Brown Handbook (5th ed. ed.). HarperCollins. ISBN 0-673-52132-X. {{cite book}}: |edition= has extra text (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Huddleston, Rodney (2002). "Singular pronouns denoting humans without specification of sex". The Cambridge Grammar of the English Language. Cambridge; New York: Cambridge University Press. pp. ch. 5, §17.2.4, pp. 491–5. ISBN 0-521-43146-8. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Huddleston, Rodney (2005). A Student's Introduction to English Grammar. Cambridge; New York: Cambridge University Press. pp. 103–105. ISBN 0-521-84837-7. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Jespersen, Otto (1894). Progress in Language, with Special Reference to English. New York: Macmillan.
• Liberman, Anatoly (2006). "Pluralia Tantum, Or, E Pluribus Unum: Three Adventures with the Plural". Verbatim. 31 (1): 26–29.
• Newman, Michael (1997). Epicene Pronouns: The Linguistics of a Prescriptive Problem. Outstanding Dissertations in Linguistics. New York: Garland. ISBN 0815325541.
• Pauwels, Anne (2003). "Linguistic sexism and feminist linguistic activism". In Holmes, Janet and Meyerhoff, Miriam (eds.) (ed.). The Handbook of Language and Gender. Malden, MA: Blackwell. ISBN 0-631-22502-1.. {{cite book}}: |editor= has generic name (help); Check |isbn= value: invalid character (help)CS1 maint: multiple names: editors list (link)
• Peters, Pam (2004). The Cambridge Guide to English Usage. Cambridge: Cambridge University Press. ISBN 0-521-62181-X.
• Pinker, Steven (1994). "Chapter 12: The Language Mavens". The Language Instinct. Retrieved 2007-07-09.
• Pullum, Geoffrey K. (2002-05-04). "Anyone who had a heart". speaking with Jill Kitson. Australian Broadcasting Corporation. Retrieved 2007-07-09. {{cite web}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Radford, Andrew (2004). Minimalist Syntax: Exploring the Structure of English. Cambridge: Cambridge University Press. ISBN 0-521-54274-X.
• Simpson, John (1989). The Oxford English Dictionary (2nd ed. ed.). Oxford University Press. ISBN 0-19-861186-2. {{cite book}}: |edition= has extra text (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)

External links

• Brasoveanu, Adrian. "Singular 'Donkey' Pronouns Are Semantically Distributive, Not (Necessarily) Singular".
• Chierchia, Gennaro. 'Reference to kinds across languages'. Natural Language Semantics 6 (1998): 339–405.
• Yamashina, Miyuki and Christopher Tancredi. 'Degenerate Plurals'. In Proceedings of Sinn und Bedeutung 9 (2005). Edited by Emar Maier and others.
• The Singular "They"
• Singular They and Jane Austen
• Williams, John. Singular They. "Gender Neutral Pronoun FAQ". Æther Lumina. One person's opinion.
• Pinker, Steven. Steven Pinker on the English singular "their" construction. From The Language Instinct.
• Regender can translate web pages to use the gender-neutral singular "they".
• Grammar myths debunked Geoff Pullum summarized very briefly indeed, on the occasion of the publication of The Cambridge Grammar of the English Language. Myth number three, that “‘They’ must never occur with a singular antecedent”, is disposed of in three short sentences.
• "Anyone who had a heart (would know their own language)" by Geoff Pullum. Transcript of a radio talk. This does not dodge technical issues, but it is still very accessible, and less prescriptive than usual.
• Everyone at The Times agrees ... no they don't Geoff Pullum at his prescriptive best, from the (London) Times.
• "Examples of singular "their" etc. from the OED and elsewhere". A 1986 message to NET.NLANG that copies a lot of material from the OED, and miscellaneous other material, from "Henry Churchyard's linguistics page".
• Singular "They", Department of Justice, Canada