SOLUTION: 1. ~(~C • D) 2. ~D ⊃ E 3. C ⊃ ~F //F ⊃ E

Algebra.Com
Eval error:
ModPerl::Util::exit: (120000) exit was called at /home/ichudov/project_locations/algebra.com/templates/Algebra/Questions/MoreLikeThis.pm line 159