December 2016 LSAT Section 3 Question 11

Which one of the following, if substituted for the constraint that T cannot be mentioned in chapter 1, would have the...

Tony on August 24, 2019

how do you arrive at the answer to this question

Please share guidance on how to arrive at the answer to these type of questions on logic games? Preferably if you could refer me to any of the video explanations in one of the lessons as I don't recall seeing any of these.

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Irina on August 24, 2019

@Tony,

Substitution questions are often the most challenging ones for students and are best skipped if you are short on time. One way to approach the substitution question is to see if the new constraint results in the same inference as the original one.

This game tells us that:

(1) T cannot be mentioned in chapter 1 and
(2) T must be mentioned before W, and there must be exactly two chapters between them.

This rule results in the following sequence:

T __ __ W

We can infer that since there must be at least 3 clues before W, W cannot be #1, #2 or #3 and since T cannot be #1, W cannot be #4 either. W thus must be #5, #6 and #7 and T must be #2, #3, or #4.

The question asks us which rule would have the same effect as rule (1). We can see that the inference from rule (1) is that W cannot be #4. Thus, the answer choice (B) will have the same effect as rule (1).

I am not sure if there is a specific video lesson on substitution questions, but please feel free to reach out to our support team and provide this feedback. They can be reached by tapping "support" from the left menu or by calling 855.483.7862 ext. 2 Monday-Friday 9am-6pm PT.

Let me know if you have any further questions.