Are you sure? Because people use 'their' as a singular all the time when talking about someone of an unspecified gender, and the dictionary seems to agree with

Are you sure? Because people use 'their' as a singular all the time when talking about someone of an unspecified gender, and the dictionary seems to agree with that: "belonging to or associated with a person of unspecified sex: she heard someone blow their nose loudly" http://oxforddictionaries.com/definition/english/their?q=their http://oxforddictionaries.com/definition/english/their?q=the...