Consider the following statements: S1:Every unsatisfiable is a contingency…

Consider the following statements:

S1:Every unsatisfiable is a contingency

S2:Every valid is a contingency

S3:Every invalid is a contradiction

Which of the following options represent the correct statements?

A.
S1 and S3
B.
S2 and S3
C.
S1 only
D.
None of these

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