The dictionary, as provided by Google in this case. Although you are likely to find similar definitions in any dictionary. The usage, even if falling out of fashion, is still common enough to be recorded.
> Well technically speaking that is true. But aren't there always human beings part of every conversation? And imho our wetware isn't a purely logic parser for information.
Which is fine. The original comment provided enough information to indicate that this person was referring to the original article, which reveals that the author is female. Even if you accidentally parsed "he" as referring to the male gender at first, the context surrounding the comment would quickly clarify that misunderstanding and highlight that the comment was written in a gender-neutral form. That "wetware" you refer to makes humans particularly great at forming these connections between disjointed sets of information.