Re: truth-functional form
- From: William Elliot <marsh@xxxxxxxxxxxxxxxxxx>
- Date: Sat, 28 May 2005 14:20:26 -0700
On Fri, 27 May 2005, 1st Semester Logic Student wrote:
> 2. Represent the truth-functional form of the following passage. If
> you think there is an argument being expressed, represent its
> truth-functional form as an argument of SL. Remember to be clear about
> what English sentence each sentence letter of SL you use stands for.
> "If neither Henry nor Fred will play the lawyer, then Morris will not
> be upset; and moreover, if Morris will not be upset the drama will be
> successful. Thus the drama will get good reviews. After all, both
> Henry and Fred will not play the part of the lawyer, and the drama will
> get good reviews if and only if the drama will be a success."
>
How bogus. What you get for taking logic as a philosophy course instead
of a math course. This is not a propositional logic problem as it
involves elements of first order logic tho it doesn't use quantifiers.
Here's how I'd start using notation that's clearer than just P's & Q's.
L(x) for x plays the lawyer
U(x) for x will be upset
h for Henry, f for Fred, m for Morris
First sentence is rendered
~L(h) & ~L(f) -> ~U(m)
For the second more terms need be introduce,
d for drama and predicates like L and U for
success and good reviews.
.
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