(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.

Question

Quizplus · Accepted Answer

The given argument is a syllogism with the following form:```If B then TIf not B then NTherefore, B or not B```This argument is valid because the conclusion is true regardless of the truth values of B, T, and N.

(B ? ?T) • (?B ? N) \frac { \sim \mathrm { B } \vee \mathrm { B } } { \hline \mathrm { T } \vee \mathrm { N } }

(B ? ?T) • (?B ? N) $\frac { \sim \mathrm { B } \vee \mathrm { B } } { \hline \mathrm { T } \vee \mathrm { N } }$