English really has no satisfying mechanism to do this. I'm talking about sentences in which you're speaking of a hypothetical person and you must identify him with a pronoun. See, right there. There are several options available, all equally unsatisfying:
You can use the third-person plural:
When I notice a new poster who has de-lurked, I heartily congratulate them for their courage.
I've never been fond of this because half the sentence treats the person like a plural and half treats them (correctly) as a singlular.
You could use the masculine third-person, as is the standard in traditional English:
The JW apologist must certainly be aware that he is defying orders from the WTS by posting here.
This, however, is beginning to sound a little backward in the days of sexual enlightenment.
You could use the expressions "he or she," "him or her", and "his or her":
The JW apologist must take care that when he or she expresses his or her opinions, he or she does not accidentally expose too much information about him- or herself.
The problems with this appoach are manifest.
You could use the feminine third-person:
A new poster on JWD should feel free to express herself in any way that suits her.
But simply swapping genders from the traditional English use doesn't actually solve the problem.
You could take turns using male and female pronouns:
A new poster on JWD should feel free to express herself in any way that suits her. An established poster may find that he spends considerable time writing about grammar.
This is the approach I take when writing pieces in which I have multiple generic people who exist for paragraphs at a time. However, in contexts where you have only a single generic person, it is not logical to swap her gender. And even with multiple generic people, sometimes such use is confusing.
I suppose there are a few other potential solutions, such as using "it," but I don't think many people use them. I wonder what you feel is the most natural. What techniques do you prefer?
SNG
P.S. And is there a more correct name for what I'm talking about than "generic singular third-person"?