Premises Conclusion Valid pg SolutionInvalid If p is true th

Premises:

Conclusion:

Solution

Invalid..

If p is true, then Q is true

From second line, we can conclude if p is true, then r is true...

If s is true, then r is true..!!

If s is false, then t is true..!!

Hence r and t are opposite..

Hence if p is true, then t is false..

Hence p=>q is invalid..