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

Question 297

Multiple Choice

?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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