LSAT 155 – Section 4 – Question 03

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November 2019

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Question QuickView	Type	Tags	Answer Choices	Curve This gives you an idea of how this question is “curved”— in other words, what level of scorer is likely to get this question right. It shows a model of scaled LSAT score vs probability of getting the question correct. It is based on student test results for each question. The gray bar extends from the score for a 25% chance, to the score for a 75% chance of getting the question correct. The black line in the middle is the score for a 50% chance of getting the question correct. The percentage at the right is the expected chance of someone with the same score as you on that PrepTest getting that question correct	Question Difficulty	Psg/Game/S Difficulty	Explanation

Question QuickView	Type	Tags	Answer Choices	Curve This gives you an idea of how this question is “curved”— in other words, what level of scorer is likely to get this question right. It shows a model of scaled LSAT score vs probability of getting the question correct. It is based on student test results for each question. The gray bar extends from the score for a 25% chance, to the score for a 75% chance of getting the question correct. The black line in the middle is the score for a 50% chance of getting the question correct. The percentage at the right is the expected chance of someone with the same score as you on that PrepTest getting that question correct	Question Difficulty	Psg/Game/S Difficulty	Explanation
PT155 S4 Q03	+LR	Must be true +MBT Conditional Reasoning +CondR Kick It Up +KIU	A 2% 148 B 3% 148 C 2% 147 D 91% 161 E 1% 149	134 141 147	+Easier	147.589 +SubsectionMedium

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Researcher: Newly formed neurons can help to heal an injured brain but only if they develop into the type of neurons that are most common in the injured area. Studies have shown that when a part of the brain called the striatum is injured, newly formed neurons in the striatum never become midsized spiny neurons, the type most common in the striatum.

Summary

The stimulus can be diagrammed as follows:

Notable Valid Inferences

If the striatum is injured, then newly formed neurons will not help heal the injury.

Newly formed neurons sometimes develop into midsized spiny neurons in areas of the brain other than the striatum.

Could be false. We don’t have any information about neuron development into midsized spiny neurons outside of the striatum.

Newly formed neurons are commonly found in injured areas of the brain shortly after the injury occurs.

Could be false. We don’t know anything about the amount of time between injury and appearance of newly formed neurons.

Midsized spiny neurons are not the most common type of neuron in any part of the brain other than the striatum.

Could be false. We don’t know anything about what kinds of neurons are most common in areas of the brain other than the striatum.

In cases of injury to the striatum, newly formed neurons will not help to heal the injury.

Must be true. As shown below, by chaining the conditional relationships, we know that if the striatum is injured, then the newly formed neuron will not help heal the injury.

In most cases of brain injury, newly formed neurons do not help to heal the injury.

Could be false. We don’t have any information about the quantity of brain injuries that are or aren’t healed with the assistance of newly formed neurons.

LSAT 155 – Section 4 – Question 03

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Review Results

LSAT PrepTest 155 Explanations

Section 1 - Logical Reasoning

Section 2 - Logical Reasoning

Section 3 - Reading Comprehension

Section 4 - Logical Reasoning

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