Question: Exercise 21.1 Use the indirect proof method to prove the following: 1. 1. Jv (I & E). 2. JOE/E 2. 1. (Hv B) (A

Exercise 21.1 Use the indirect proof method to prove the following: 1. 1. Jv (I & E). 2. JOE/E 2. 1. (Hv B) (A & E) 2. (EvS) (G&~H)/~H VAIOC 3. 1. (~J v I) (A & B) 2. (AvZ) (BJ)/J 4. 5. 1. Av (L&P) 2. AL/L 1. ~BC 2. COB/B 6. 1. GO N 2. ~ A 3. GA/~ N 7. 8. 1. ~~M (NO) 2. ~O 3. (MN) MO/0 (~~A & A) (A & ~A) 1. 2. A B ~ 9. 3. ~B/~A 1. A 2. AB 3. (A & B) K 10. 4. 1. 2. KG/G (Av B) (G&W) ~G/~A 181 ()

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