Hi there,

just wondering if for example the stimulus for a parallel question is A -> ~B, conclusion: B -> ~A (correct reasoning),

does the answer has to be

C -> ~D

Conclusion: D -> ~C

can it be just

C -> D

~D -> ~C

another question, if stimulus A -> B, B -> A (mistaken reversal)

does the answer has to be reversal or can it be a mistaken negation? since reversal and negation are basically the same, would that be an acceptable answer?

## Parallel Question

- boblawlob
**Posts:**524**Joined:**Mon Oct 11, 2010 7:29 pm

### Re: Parallel Question

I am not necessarily answering your question directly, but I learned this weekend when drilling Parallel questions that if

Stim: A->B

B->C

Therefore, A ->C

Then the answer choice can be

A->B

B->C

-C->-A

Since contrapositive is saying the same exact thing.

So a mistaken negation is the contrapositive of a reversal, I would have to assume that the answer choice can be either reversal or mistaken negation. However, I have yet to come across such a correct answer choice with such a scenario. But I have come across at least one correct AC in the vein of my example above.

Stim: A->B

B->C

Therefore, A ->C

Then the answer choice can be

A->B

B->C

-C->-A

Since contrapositive is saying the same exact thing.

So a mistaken negation is the contrapositive of a reversal, I would have to assume that the answer choice can be either reversal or mistaken negation. However, I have yet to come across such a correct answer choice with such a scenario. But I have come across at least one correct AC in the vein of my example above.

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