Solved
(B ? ?T) • (?B ? N) \frac { \sim \mathrm { B } \vee \mathrm { B } } { \hline \mathrm { T } \vee \mathrm { N } }
Multiple Choice
(B ? ?T) • (?B ? N) \frac { \sim \mathrm { B } \vee \mathrm { B } } { \hline \mathrm { T } \vee \mathrm { N } }
A) CD-valid.
B) Invalid.
C) DD-valid.
D) DA-invalid.
E) MP-valid.
Correct Answer:

Verified
Correct Answer:
Verified
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