I, and many people I have heard, occasionally use 'they' and 'their' in the singular when gender is not known. For example, Someone burgled our house yesterday. They must've cut their head on the broken window, because there is blood there. I would like to know: Is this incorrect or not ...

I felt sure this question must have been asked here before, but I was unable to find it during a search: How should we define "correct English?" I think we all acknowledge that English is a living language, and usage abhorrent to speakers 100 years ago is commonly accepted today. Several folks...

How do you add text which provides context to a quote? For example, consider if I were to quote someone as having said: This is unacceptable! Were that the whole quote, can I add any text to the quote to indicate what "This" refers to? I think I've seen it done with square brackets... ...