1. ~(Hv~K) 2. L-->H /L-->M 3. ~H&~~K 1, DM (DeMorgan's law) 4. ~H&K 3, DN (double negation) 5. ~H 4, simp. (simplification) 6. ~L 2,5, MT (Modus tollens) 7. ~LvM 6, add. (addition) 8. L-->M 7, MI (material implication) [This is an illustration of the fact that a false statement implies anything. :) ] Edwin