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# Necessary condition.

Alum Member
edited July 2016 in General 392 karma
Hi guys so I have noticed while going through the SA and PSA questions that the answer choice must have the conclusion in the necessary condition. This is very important for me as I often miss answers because of this. Can anyone expand on the theory and understanding behind this and why it occurs. That would help me out a lot. Thanks in advance
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• #### Contrapositives and Denying the Necessary ConditionCan anyone point me to a lesson that explains when contrapositives should be utilized and when it should be ignored?

• Inactive ⭐
1294 karma
From my understanding, it is because we are trying to reach the conclusion from the premises.

In the curriculum, j.y teaches the formula, P->C, if premise, then conclusion. Our task for SA and PSA assumption is to guarantee the argument, and we do that by showing that the premises lead to the conclusion.
• Member
edited July 2016 611 karma
@Euthyphro said:
I have noticed while going through the SA and PSA questions that the answer choice must have the conclusion in the necessary condition.
This isn't true. I semi-randomly looked at three recent SA questions -- 77.4.24, 77.4.20, and 76.2.22 -- and none of the correct answer choices even mentioned the conclusions of the arguments.
• Alum Member
218 karma
@quinnxzhang => This is correct!
Don't ever assume on the LSAT that something like a conclusion has to be in an answer choices as true. It does not have to include a conclusion for assumption questions. It can be premises, a random fact, something that makes the conclusion valid.