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    Mathematics
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    A Concise Introduction to Logic
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    Exam 6: Propositional Logic
  5. Question
    S ∨ ∼T
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S ∨ ∼T

Question 17

Question 17

Multiple Choice

S ∨ ∼T S ∨ ∼T   A)  DA-invalid. B)  CD-valid. C)  Invalid. D)  DD-valid. E)  CD-invalid.


A) DA-invalid.
B) CD-valid.
C) Invalid.
D) DD-valid.
E) CD-invalid.

Correct Answer:

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