Re: Discussion Problem_ (8)

Posted by duck on Apr 16, 2013; 3:30pm
URL: http://discussion-forum.276.s1.nabble.com/Discussion-Problem-8-tp7580077p7580093.html

@Ankit:
SS has correctly pointed out.
 
X implies Y means that if X is false, then Y can be true/false.
But, look at option(f): It only says that: If X is false, then Y is false.

Also, you can think of it in terms of necessary and sufficient conditions.
Y is a necessary condition for X.
It means if Y doesn't hold then X too won't hold.
So, we can perfectly infer option(a) from X implies Y.