Question 1140110
<pre>1. K⊃L 
2. ∼(L•F)
3. F         / ∼K

4. ~L∨~F     2, deMorgan's law
5. ~F∨~L     4, commutation
6. ~~F       3, double negation
7. ~L        5,6, disjunctive syllogism
8. ~K        1,7, modus tollens

Edwin</pre>