I.   The truth table for ~(~P & ~Q).

        P   Q   ~P   ~Q   (~P & ~Q)   ~(~P & ~Q)
        ----------------------------------------
        T   T   F    F        F       T
        T   F   F    T        F       T
        F   T   T    F        F       T
        F   F   T    T        T       F

      II.   The truth table for (P v Q).

        P   Q   (P v Q)
        ---------------
        T   T      T
        T   F      T
        F   T      T
        F   F      F
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