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G ? ?T (GH)(TA)HA\frac { ( \mathrm { G } \supset \sim \mathrm { H } ) \cdot ( \sim \mathrm { T } \supset \mathrm { A } ) } { \sim \mathrm { H } \vee \mathrm { A } }

Question 73

Multiple Choice

G ? ?T (GH) (TA) HA\frac { ( \mathrm { G } \supset \sim \mathrm { H } ) \cdot ( \sim \mathrm { T } \supset \mathrm { A } ) } { \sim \mathrm { H } \vee \mathrm { A } }


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

Correct Answer:

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