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(R ? ?T) • (D ? T) TTRD\frac { \sim \mathrm { T } \vee \mathrm { T } } { \sim \mathrm { R } \vee \sim \mathrm { D } }

Question 245

Multiple Choice

(R ? ?T) • (D ? T) TTRD\frac { \sim \mathrm { T } \vee \mathrm { T } } { \sim \mathrm { R } \vee \sim \mathrm { D } }


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

Correct Answer:

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