PT59 S2 Q19

babybenny

As far as I remember about conditional reasoning, if:

1. A-> B
2. C-> ~A

I can combine 1 and 2 (~B-> ~A: Contrapositive #1 and C-> ~A) and turn out C-> ~B.

So the diagram about the stimulus I thought was:

1: B-> A
2: L-> ~B

So contrapositive #1: ~A-> ~B
And I combined 1+2 and turned out L-> ~A, so that's why I chose E, but the answer is C.

So I have no idea why E is wrong. Am I missing something?
And why is C an answer?

Please someone explain me.
Thanks!

nye8870

“All bankers are Athletes” translates: Banker --> Athlete.
“None of the Lawyers are Banker’ translates: Banker --> /Lawyer.
If you are a banker, you are an athlete and you are not a lawyer. Hence ac(C) “Some athletes are not lawyers.” Yes, like the Bankers. They are athletes and they are not lawyers. Remember if a sufficient condition implies two or more necessary conditions, there is automatically a “some” relationship between those necessary conditions. If you have not watched JYs “list” method for seeing this, you should check it out.