Question

use truth tables to test the validity of the argument.
P->~q
q->~p
-------
.
. . P v q

Answer 1

i dont get it?

Answer 2

Do you understand the basic one, that if p -> q, then ~q -> ~p??

Answer 3

i believe its valid?

Answer 4

You're talking about my question, or your original question?

Answer 5

my original question..

Answer 6

It's helpful if you listen to me for a second.

Answer 7

So again, do you understand what's going on when we say that
if p -> q, then ~q -> ~p?

Answer 8

no

Answer 9

Put it into words suppose I say that
if the sun shines tomorrow, I will go to the beach

Answer 10

p = the sun shines tomorrow
q = I will go to the beach
and p -> q is what I said
if the sun shines tomorrow, I will go to the beach

Answer 11

OK so far?

Answer 12

ya

Answer 13

Now, suppose tomorrow you find me not at the beach but somewhere else?
I said, no matter what I am skipping work/school to go to the beach if the sun shines.

Answer 14

You find me at the mall, what can you conclude?

Answer 15

huh...?

Answer 16

I think you'll need someone else. Sorry.

Answer 17

its ok