I'm confused regarding why on question 7, the last sentence is diagrammed as an either/or statement with the necessary condition negated, but in the earlier lesson in this series addressing either/or statements, it says we are to negate the sufficient statement.
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I have the same problem. Can anyone please explain?
AymardFebruary 7, 2022
Exactly I dont understand it
Ross-RinehartFebruary 8, 2022
Sorry this wasn’t clearer! The way he diagrammed the last sentence does have the sufficient condition negated! The two conditions in the “either/or” claim are “unpopular with the faculty” and “unpopular with the students.” Since “unpopular” is a negative term, it’s best if we diagram it with a strike through it or by putting a NOT in front of it. So we can start with:
NOT Popular with Faculty ? NOTPopular with Students
Once we negate the sufficient condition (by removing the strike or the NOT), we get:
Popular with Faculty ? NOT Popular with Students
I know it doesn’t look like the sufficient is negated, since the necessary is the condition with the strike through it or the NOT before it. But that’s just what happens when you start with negative terms like “unpopular” and then negate them.
