Indeed you were not. However, given that you generalized about the categories within which this paper presumably lies, I felt it amusing to point out that, using this paper as a start, one could generalize about any particular categories of papers.
Oh, that might just be the result of my not being a native speaker. In my language, the term "scientific" refers to articles in both the Humanities and Social Sciences as well as what Science refers to in English. Hence, I usually feel the need to specify all of those. In other words: it had nothing to do with the mentioned article being part of those domains :)
Given its, uh, content, this particular paper can really be classified as anything.