Sentence Tableau...: Philosophy Forums

Sentence Tableau...

Horace
Student

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Joined: May 17, 2009

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Posted 06/28/09 - 11:50 AM: Subject: Sentence Tableau...	#1
Hello folks, have I constructed this sentence tableau correctly. I am presenting the arguments as P [P therefore Q] R [ [Q^R] therefore S] Therefore S 1. P 2. [P therefore Q] 3. R 4. [ [Q^R] therefore S] 5. Therefore S P (line 1) \| R (line 3) \| S (line 5) ___\|____ \| \| -P Q (line 2) ___ __\|___ \| \| (line 4) -Q S -R ____

Horace
Student

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Joined: May 17, 2009

Total Topics: 20
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Posted 06/30/09 - 03:12 PM:	#2
Come on people... I am mostly wondering how this [ [Q^R] therefore S] would break down I think it is -Q S -R ___ But I am not sure

Horace
Student

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Joined: May 17, 2009

Total Topics: 20
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Posted 06/30/09 - 03:13 PM:	#3
The formatting is messed up. It's hard to relate.

7
Assistant Professor

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Posted 07/01/09 - 03:07 PM:	#4
Horace wrote: Come on people... I am mostly wondering how this [ [Q^R] therefore S] would break down I think it is -Q S -R ___ But I am not sure First it should go ~(Q ^ R) on one branch and S on the other. Next, you apply the 'not ^' rule to ~(Q ^ R), which splits that branch to two additional branches with the next nodes ~Q and ~R.

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