?A ? ?H $\frac{\mathrm{E} \supset \sim \mathrm{A}}{\mathrm{E} \supset \sim \mathrm{H}}$
A) DD-valid.
B) MP-valid.
C) CD-valid.
D) Invalid.
E) HS-valid.

Name: ?A ? ?H $\frac{\mathrm{E} \supset \sim \mathrm{A}}{\mathrm{E} \supset \sim \mathrm{H}}$ A) DD-valid. B) MP-valid. C) CD-valid. D) Invalid. E) HS-valid.
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The Answer of ?A ? ?H $\frac{\mathrm{E} \supset \sim \mathrm{A}}{\mathrm{E} \supset \sim \mathrm{H}}$
A) DD-valid.
B) MP-valid.
C) CD-valid.
D) Invalid.
E) HS-valid.

?A ? ?H E⊃∼AE⊃∼H\frac{\mathrm{E} \supset \sim \mathrm{A}}{\mathrm{E} \supset \sim \mathrm{H}}E⊃∼HE⊃∼A​ A) DD-Valid

?A ? ?H $\frac{\mathrm{E} \supset \sim \mathrm{A}}{\mathrm{E} \supset \sim \mathrm{H}}$ A) DD-Valid