e) 1. (co d). (dob) 3. (doc) 4. bve 6. 7. 9.
philosophy symbolic logic. use the eight rules of inference in natural deduction to prove the argument. don't omit the justifications for each line.
note from my instructor: you are not allowed to do a cd on three lines, you are not allowed to simp the right hand side of lines 1 and 2,
the only 8 rules of inference allowed are: mp, mt, conjuction, ds, hs, cd, simp, addition.
a variant of this problem is number 28 of 7.2-iii on the textbook "a concise introduction to logic edition 12th". i already tried following it, but my instructor kept telling me my answer is incorrect. i already made 6 attempts in total. . you.