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E ? ?A B⊃∼EB⊃A\frac { B \supset \sim E } { B \supset A }

Question 60

Multiple Choice

E ? ?A B⊃∼EB⊃A\frac { B \supset \sim E } { B \supset A }


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

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