Yeah, you can replace “typically” with “often” in both papers, and there’s no problem. And presumably his paper didn’t actually do the sort of broad analysis you’d need to argue that something held in the majority of cases. So the issue is that the student wasn’t being logically rigorous and precise, and the teacher didn’t mark down or comment on that. But that really isn’t the point of the course.
Yeah, you can replace “typically” with “often” in both papers, and there’s no problem. And presumably his paper didn’t actually do the sort of broad analysis you’d need to argue that something held in the majority of cases. So the issue is that the student wasn’t being logically rigorous and precise, and the teacher didn’t mark down or comment on that. But that really isn’t the point of the course.