?T ? F $\frac { \sim \mathrm { F } \supset \mathrm { G } } { \sim \mathrm { T } \supset \mathrm { G } }$
A) Invalid.
B) CD-valid.
C) HS-valid.
D) CD-invalid.
E) DA-invalid.

Question

Quizplus · Accepted Answer

The Answer of ?T ? F $\frac { \sim \mathrm { F } \supset \mathrm { G } } { \sim \mathrm { T } \supset \mathrm { G } }$
A) Invalid.
B) CD-valid.
C) HS-valid.
D) CD-invalid.
E) DA-invalid.

?T ? F ∼F⊃G∼T⊃G\frac { \sim \mathrm { F } \supset \mathrm { G } } { \sim \mathrm { T } \supset \mathrm { G } }∼T⊃G∼F⊃G​

?T ? F $\frac { \sim \mathrm { F } \supset \mathrm { G } } { \sim \mathrm { T } \supset \mathrm { G } }$