1. N > (F & A) 2. B > (R & F) / (N v B) > (A v R) 3. N v B Conditional Proof Assumption 4. (F & A) v (R & F) 1,2,3 Constructive Dilemma 5. (F & A) v (F & R) 4, Commutativity 6. F & (A v R) 5, Distribution 7. A v R 6, (Conjunctive) Simplification 8. (N v B) > (A v R) 3-7 Conditional Proof Edwin