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?D ? ?C RDRC\frac { \mathrm { R } \supset \sim \mathrm { D } } { \mathrm { R } \supset \sim \mathrm { C } }

Question 93

Multiple Choice

?D ? ?C RDRC\frac { \mathrm { R } \supset \sim \mathrm { D } } { \mathrm { R } \supset \sim \mathrm { C } }


A) MP-valid.
B) DS-valid.
C) Invalid.
D) CD-valid.
E) HS-valid.

Correct Answer:

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