How to avoid the awkward ‘he or she’
You see them all the time: messages that, while grammatically incorrect, are still intelligible. This includes sentences where antecedents and their pronouns don’t agree. Usually, you can figure out what the writer is trying to say, but that doesn’t excuse the error.
Take a look at this sentence:
You need to keep an eye out to make sure that you’re not flip-flopping from singular to plural and back again in your writing. Pick one, and stick with it.