Question 628777
p    q     ~p     ~q     ~p->~q
0    0&nbsp;&nbsp;     1 &nbsp;&nbsp;  1 &nbsp;&nbsp; 1
0    1&nbsp;&nbsp;     1 &nbsp;&nbsp;  0 &nbsp;&nbsp; 0
1    0&nbsp;&nbsp;     0 &nbsp;&nbsp;  1 &nbsp;&nbsp; 1 
1    1&nbsp;&nbsp;     0  &nbsp;&nbsp; 0 &nbsp;&nbsp; 1