P: X → AP: not B → not AP: B → DC: ?

MsLaurenLorde June 13, 2017

Don't understand

I'm not sure how the conclusion was answered?

Create a free account to read and take part in forum discussions.

Already have an account? log in

Mehran June 28, 2017

@MsLaurenLorde this is the transitive property:

X ==> A ==> B ==> D

This chain is created with P1, the contrapositive of P2 (i.e. A ==> B) and P3.

So the conclusion here is: X ==> D

Hope that helps! For a more in-depth review of these concepts, please watch our video lesson on Sufficient & Necessary Conditions.