This paper makes two considerations about Duns Scotus’s method from their Quaestiones Librum Porphyrii Isagoge: 1) the presence and use of other authors in the mentioned Scotus’s work; 2) the approach to the content of the mentioned work. Regarding the former, it is shown that the most used author is Aristotle. Regarding the second, that Scotus extends the content covered in the Isagoge and aiso exposes, develops and articulates such content in light of their own points of view.