The truth remains that if you use "they" as singular you sound like a moron.
"Someone" has indefinite number and is not singular. Implicitly plural antecedents ("anyone", "everyone", "each ...") are not singular either.
"Someone" has indefinite number and is not singular. Implicitly plural antecedents ("anyone", "everyone", "each ...") are not singular either.
Bind this in a nice cover and you'll be sure to get your linguistics doctorate summa cum laude.