$$[(p'\wedge r)\vee(p\vee q')]'\equiv 0$$
$$ [(p'\wedge r)'\wedge(p\vee q')']\equiv 0$$
$$ [(p\vee r')\wedge(p'\wedge q)]\equiv 0$$ Buradan
$$p\vee r'\equiv 0\quad p'\wedge q \equiv 0$$
$$\Rightarrow p\equiv 0,\quad r'\equiv 0,\quad q\equiv 0$$
olacaktır.