Correct

Well, this is a little ambiguous. The concept of generalizability
refers to the application of results to persons, times, places,
and conditions beyond those in the research. When we
study one specific individual, we cannot generalize to a
whole population (other persons), but we may be interested
in generalizing over time, and perhaps to other situations. That is,
we may be interested in knowing whether the results will hold up
over time and for other settings. Nevertheless, it would be too
strong a statement to say that generalizability is a central issue
in studying a single person.