LSAT 43, Logical Reasoning II, Q9, LSATHacks

LR Question 9 Explanation, by LSATHacks

QUESTION TEXT: Most lecturers who are effective teachers are eccentric…

QUESTION TYPE: Must be True

PARADOX:

1. Most effective teachers and lecturers are eccentric.
2. Some effective teachers are not eccentric.
3. All effective teachers are good communicators, whether or not they are eccentric.

ANALYSIS: We can combine the first two sentences to say that “most but not all effective teachers are eccentric.” We can say that all of those effective teachers are good communicators, because all effective teachers are.

So some good communicators are eccentric, and some aren’t.

___________

1. CORRECT. Yes. We know that most lecturers who are effective teachers are eccentric. This is similar to saying that some effective teachers are eccentric. And all of those effective teachers are good communicators. So some good communicators are eccentric.
2. This is an improper reversal of the terms. All effective teachers are good communicators, but there could be good communicators who are not even teachers, let alone effective ones.
3. The stimulus gives us no information about lecturers who are not effective teachers.
4. We only know about lecturers who are effective teachers. It would be possible to be a lecturer, a good communicator, yet a terrible teacher. Maybe they are lazy.
5. This actually has to be false. An effective teacher is a good communicator.

Recap: The question begins with “Most lecturers who are effective teachers are eccentric”. It is a Must be True question. Learn how to master LSAT MBT questions on the LSAT Logical Reasoning question types page.

Hi, I'm Graeme Blake

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