Thanks. As I noticed, the box object (view) in the tutorial, when you draw it, covers a few regions of the priority, from #13 at the "bottom" of the box to #09 at the "top" of the box. Yet the box as a whole is drawn with priority #13. So what that means, if I understand things correctly, is that the entire box is forced to have priority #13 even at parts of the screen that have other priorities. This is what forces the box to be "greater than" Ego because while the box priority has been changed, Ego's has not and remains the default relative to whatever area of the screen it is at.
The tutorial basically says that, but not quite in those words. I have been sort of re-writing the tutorial for myself and perhaps for others who are really getting into this SCI thing. How I am wording it is as by generalizing (in part):
"So when you draw on object that you want to have a greater priority than Ego (meaning it will appear in front of Ego), you must draw it visually, with the Visual Color and on the Visual Screen, but with the Priority Color to a value that is greater than Ego's priority color at that point on the screen. Note that you will also want to draw control boundaries around your view if it has greater priority than Ego so that the Ego cannot walk through the object. This has to be done on the Control Screen."
I have gotten good feedback from some people, indicating that this made sense to them so I felt it somewhat prudent to make sure I was actually correct in what I was saying!
Again, thanks for confirming my conceptual base.