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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
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