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Logic: Completing Proofs

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studentb
 
Reply Sun 14 Oct, 2012 02:47 pm
Complete this proof:
1. (Q∨R)→(W∨U)
2. W→P
3. Q∙T
4. U→Z
5. S→M
6. S∨~Y
7. (P∨Z)→~M ∴ ~Y
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Type: Question • Score: 0 • Views: 1,623 • Replies: 1
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markr
 
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Reply Sun 14 Oct, 2012 06:50 pm
@studentb,
Assuming . means and:

3: Q is true
1: therefore (W or U) is true
2, 4: therefore P is true or Z is true,
7: therefore M is false
5: therefore S is false
6: therefore Y is false
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