[cbsmith]

While I agree that being a data scientist increases the odds one might know a thing or two about online advertising, it's far from a strong indicator, so I'm not sure what your basis for suggesting a "non-trivial chance".

Ms. Mason has confirmed her lack of domain expertise, so I guess that settles it.

In the process of attempting to highlight an important lesson about applying data analysis, she has highlighted another important and related lesson: regardless of the level of one's data analysis expertise, without domain expertise to contextualize the data, it is terribly difficult to do any kind of useful analysis.