<PRE><B>Question 932733</B>
&lt;pre&gt;
1.  (S v T) &gt; (S &gt; ~T)
2.  (S &gt; ~T) &gt; (T &gt; K)
3.  S v T 
/   S v K
-------------------------------------------------------
4.  S &gt; ~T               1,3       Modus Ponens
5.  T &gt; K                2,4       Modus Ponens
6.  ~~S v T              3         Double Negation
7.  ~S &gt; T               6         Material Implication
8.  ~S &gt; K               7,5       Hypothetical Syllogism
9.  ~~S v K              8         Material Implication
10. S v K                9         Double Negation
&lt;/pre&gt;

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