Philosophy 633—Spring 02
Vagueness
Delia Graff
Assignment #3
Due Monday, March 3
rd
What is the degree of validity (in Machina's sense) of
Disjunctive Syllogism
—the inference from ¬
p
and
p
∨
q
to
q
?
Prove that your answer is correct.
Sample proof that
Modus Ponens
is valid to degree .5: (
PDF File
)
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