I am reading an article now and facing some strange usage of pronouns:
An agent’s probabilities are defined by her willingness to place or accept any bets she believes to be favorable to her on the basis of those probabilities.
The gender of the agent is not defined. Why can't we use the neutral "one" or "one's" in this case? Is this example a manifestation of any new trend in English language?
UPDATE: Excuse me, it was just my misconception. The author stated in the footnote, which I have not initially noticed, that the agent is a female (the article is about quantum physics, and in its tradition there are two general agents – Alice and Bob, so the author was considering Alice).