Question 1137127
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1. ~(SvQ)   /~P>~S

2, ~S&~Q     1, DeMorgan's rule

3. ~S        2, Simplification

4. ~SvP      3, Addition

5. Pv~S      4, Commutation

6. ~~Pv~S    5, Double negation

7. ~P>~S     6, Material implication

Edwin</pre>