Every argument rests on unstated beliefs. Campos Arenas teaches the "What must be true for this conclusion to follow?" method.
A significant portion of his writing is dedicated to the "how-to." He discusses techniques such as:
After class, Agustín Campos Arenas himself appeared at the university’s small auditorium for a guest lecture. He walked to the podium, scanned the room, and paused when he saw the name of the PDF file displayed on the projector.
An argument = premise(s) + conclusion. "All humans are mortal. Socrates is human. Therefore, Socrates is mortal." Practice: Underline the conclusion in any editorial.