Inclass Exercise: Formal Validity
4/17/2009
Phil. 110  Olsen
For each of the following arguments, provide substitutions for the statements to render each
argument in
standard form
, and then name the argument form.
Argument
Standard Form
Argument Name
All Americans are honest.
Bernard Madoff is an American.
Therefore, Bernard Madoff is honest.
All S are P.
X is an S.
Therefore, X is P.
VF3
If Tuesday is the 14th, then Friday
must be the 17th.
Tuesday is the 14th.
Therefore, Friday is the 17
th
.
If P, then Q.
P.
Therefore, Q.
MP
If it had rained this morning, then the
grass would still be wet.
But the grass is not wet.
Therefore, it did not rain this morning.
If P, then Q.
NotQ.
Therefore, notP.
MT
If an act is done out of selfinterest,
then it cannot be praiseworthy.
If it cannot be praiseworthy, then it is
not moral.
Thus, if an act is done out of self
interest it is not moral.
If P, then Q.
If Q, then R.
Therefore, if P then R.
HS
All professors wear sweater vests.
Mike does not wear sweater vests.
Therefore, Mike is not a professor.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '07
 KAY
 Logic, Standard form, Bernard Madoff, sweater vests, Formal Validity

Click to edit the document details