JNU 2011 QSTNS

Posted by tania on Nov 21, 2014; 4:36pm
URL: http://discussion-forum.276.s1.nabble.com/JNU-2011-QSTNS-tp7595639.html

Q1- Let X, Y and Z be statements. Suppose:
     X is True implies Y is true
     if X is false implies Z is true , then if we know that Z is false, we can conclude:
1. both X and Y are true
2. both X and Y are false
3. X is true and Y is false
4. X is false and Y is true
 
Part 2- Suppose - X implies Y and that Y implies z. If we also know Y is false , then we can conclude:
1. X is true
2. X is false
3. Z is true
4. Z is false