I assume you are referring to the last sentence of the passage in Example #7? At minute 2:24:26 of the video, "either with faculty or among students" is diagrammed as a typical two-variable either/or statement. (To clarify, when a sentence is set up as "either x or y," it is written as a standard either/or statement, not as a typical compound sentence.) This is written as: PF -> Not PS, and the contrapositive is: PS -> Not PF.
If you are referring to Answer Choice (A) in Example #7, we do not need to diagram the phrase out because the first half of the sentence is off topic and therefore makes the entire sentence incorrect.
Does that make sense? Please reach out with any additional questions!
