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| − | {| align="center" cellpadding="8" style="text-align:center"  | + | {| align="center" cellpadding="0" cellspacing="0" style="border-left:1px solid black; border-top:1px solid black; border-right:1px solid black; border-bottom:1px solid black; text-align:center"  | 
| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-0.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-1.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-2.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-3.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-4.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-5.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-6.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-7.jpg]]
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-8.jpg]]
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| − | |-
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| − | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-9.jpg]]
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| − | |}
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| − | <br>
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| − | {| align="center" cellpadding="8" style="text-align:center"
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|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-0.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-0.jpg|500px]]  | 
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|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-1.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-1.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cast P.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-2.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-2.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Domination.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-3.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-3.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cancellation.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-4.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-4.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cast Q.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-5.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-5.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cancellation.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-6.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-6.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Domination.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-7.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-7.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cast R.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-8.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-8.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- Cancellation.jpg|500px]]  | 
|   | |-  |   | |-  | 
|   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-9.jpg|500px]]  |   | | [[Image:Proof (P (Q)) (P (R)) = (P (Q R)) 2-1-9.jpg|500px]]  | 
|   | + | |-  | 
|   | + | | [[Image:Equational Inference Bar -- DNF.jpg|500px]]  | 
|   | |}  |   | |}  |