LSAT Hacks

The Explanations That Should Have Come With The LSAT

LSAT Explanations » LSAT Preptest 70 » Logical Reasoning 1 » Question 9

LSAT 70, Logical Reasoning I, Q9

LSAT 70 Explanations

LR Question 9 Explanation

QUESTION TYPE: Flawed Reasoning

CONCLUSION: There is good reason to think that the hypothesis is false.

REASONING: There’s no evidence for the hypothesis.

ANALYSIS: I intentionally simplified the conclusion and reasoning to make the error clearer. You can’t conclude that something is wrong just because there’s no evidence to support it. To prove that something is wrong you need actual evidence against it.

The astronomer only has lack of evidence. He should have concluded “I don’t know if the hypothesis is right or wrong. I have no evidence for or against it.”

Instead, he assumes that the hypothesis is wrong. When you have no evidence, you can’t do that. You have to say “I don’t know”. Something can be right even if you currently lack evidence that it is.

Don’t let the science talk frighten you. Almost all of it is fluff. The entire argument is in the final sentence.

___________

  1. CORRECT. The astronomer says there is ‘good reason’ to think that the hypothesis is false. Good reason = evidence. Why does the astronomer think that there is evidence against the hypothesis? In the final sentence, his only proof is that there is no evidence for the hypothesis.
  2. The astronomer didn’t say that the hypothesis is inherently implausible. He just said that there’s currently no evidence for it.
  3. The astronomer didn’t mention any hypothesis that is equally likely to be true.
  4. Which premises contradict the conclusion? If the flaw didn’t happen, then an answer can’t be correct.
  5. This isn’t a flaw. If your opponent makes a true claim, then you must grant that it’s true, even if it weakens your argument.

Previous Question
Table Of Contents
Next Question


Free Logical Reasoning lesson

Get a free sample of the Logical Reasoning Mastery Seminar. Learn tips for solving LR questions

Hi, I'm 

I run LSAT Hacks, and got a 177 on the LSAT. The single best thing I've ever made is the set of LSAT Mastery seminars. They show you how to think like a 170+ scorer when doing questions. Get them here: Mastery Seminars

I guarantee you'll like them, or you get your money back within 7 days. There's no risk. Check the reviews, people have said they improved within a few days.
---------
Photos and Updates: You can follow me on Instagram here

For updates, sign up for my email list. I update whenever I have new posts.

>