Introductory Logic 
Quiz #3

March
17 , 2006

Name: ________________________ 
R. Hammack

Score: _________

~

(

~

P

⊃

Q

)

~

Q

•

~

P


F

F

T

T

T

F

T

F

F

T


F

F

T

T

F

T

F

F

F

T


F

T

F

T

T

F

T

F

T

F


T

T

F

F

F

T

F

T

T

F

2. Decide if the following argument is valid or invalid by writing out
its truth table.
Be sure to explain how your answer follows from the
truth table.
P ⊃ Q 
~(Q • ~R) 

P ⊃ R 
P

⊃

Q

~

(

Q

•

~

R

)

P

⊃

R


T

T

T

T

T

F

F

T

T

T

T


T

T

T

F

T

T

T

F

T

F

F


T

F

F

T

F

F

F

T

T

T

T


T

F

F

T

F

F

T

F

T

F

F


F

T

T

T

T

F

F

T

F

T

T


F

T

T

F

T

T

T

F

F

T

F


F

T

F

T

F

F

F

T

F

T

T


F

T

F

T

F

F

T

F

F

T

F
