# I need to prove the validity of these problems by using the 18 proof rules.

Mar 4th, 2015
Anonymous
Category:
Humanities
Price: \$15 USD

Question description

(1)  1. ~M or N

2. ~R implies ~N/: M implies R

(2)  1. ~A implies (B and C)

2. ~C/: A

(3)  1. H implies K

2. C iff D

3. ~C implies ~K/: H implies D

(4)  1. (A and B) implies C

2. A and ~C/: ~B

(1)   1. (A and B) implies R

2. A

3. C implies ~ R/: ~(C and B)

(2)  1. ~H

2. H or K

3. L implies H

4. ~(K and ~L) or (~L and M)/:M

(3)  1. ~(D or C)

2. ~C implies (A implies ~B)

3. A iff B/: ~A

(4)   1. A or B

2. C

3. (A and C) implies D/: D or B

(5)   1. A implies B

2. A or (B and C)/: B

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