Link to explanation of The Rhetorical Situation in more detail

What's the difference?  These terms are different; study closely to understand those differences. 

Explanation by Travis McNair

Lecture version presented by Lisette Blanco-Cerda with OWL Slideshow (Purdue University)

TedTalk by Rory Sutherland discussing a selection of perspectives to speak on the importance of perspective in general.  There are innumerable perspectives on every possible issue!