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    A Concise Introduction to Logic
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    Exam 4: Categorical Propositions
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    No Sand Castles Are Permanent Structures
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No Sand Castles Are Permanent Structures

Question 34

Question 34

Multiple Choice

No sand castles are permanent structures. Therefore, some sand castles are not permanent structures.


A) Invalid, illicit subcontrary.
B) Invalid, illicit subalternation.
C) Valid, no fallacy.
D) Invalid, illicit contrary.
E) Invalid, illicit conversion.

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