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if p tends(~p^~q) is false,then the truth value of p and q are respectively:


kallamvgreddy123 14th Mar, 2020
Answers (2)
Nikhitha Sai 14th Mar, 2020

Hello. So this is considered as,

"p implies negation p and negation q " should be false  precisely p=> (~p^~q) =false

First rule of implication, a true statement cannot imply a false statement. If this is the case end result is false. So lhs value should be true that is p value should be true and entire rhs value is false

so p values is true

Coming to rhs , it should be false.

Since p value is true, negation p is false. (False ^~q) Is false

Rule of and implies, if both are false then end result is false or both are true end result is true.

Here we need to take first case since we need end result as false.

So ~q should be false. There by q value is true

q value is true

wo values of p and q are true, true


Smrity 14th Mar, 2020

Hello,

since we know that:

p->(~p^~q) is false

the truth table is as follows:

p              q                  p ^q                       ~(p^q)              p->n(p^q)

T               T                     T                             F                      F

T                F                     F                            T                      T

F                 T                     F                             T                     T

F                 F                     F                             T                      T

SO  both p and q are True that is the the truth value of p and q are T.

I hope this helps.

All the best!

3 Comments
Comments (3)
14th Mar, 2020
by seeing what?we can say that both values are true
Reply
14th Mar, 2020
kallamvgreddy123 If You see the first condition of the truth table you can see that the value of teh given condition is false only in one case when p and q both are true. thus, the values are true.
Reply
15th Mar, 2020
Smrity thankyou for your answer.
Reply

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