Question 478097
the truth table would look like this:
<pre>
       p  q  r  ~r p->~r
                      (p->~r)v(q)
       T  T  T  F  F  T
       T  T  F  T  T  T
       T  F  T  F  F  F
       T  F  F  T  T  T
       F  T  T  F  T  T
       F  T  F  T  T  T
       F  F  T  F  T  T
       F  F  F  T  T  T
</pre>