Logical ReasoningDifficulty: Medium

PT152 S1 Q15 ExplanationIt has been said that understanding a person

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsFlaw

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Stimulus

It has been said that understanding a person completely leads one to forgive that person entirely. If so, then it follows that complete self-forgiveness is beyond however desirable, is unattainable.

What this question is testing

Flaw

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
15.

A flaw in the reasoning in the argument above is that

Answer choices, explained

  1. Correct75% picked this

    treats the failure to satisfy a condition that brings about a particular outcome as if satisfying that condition is the only

    Why this is right

    This is just classic Necessary vs. Sufficient, in synonym form. condition that brings about an outcome = SUFFICIENT the only way to realize the outcome = NECESSARY Understanding oneself fully would bring about the particular outcome of completely forgiving oneself. But the author treats "understanding oneself fully" like it's the only way to completely forgive oneself, because she thinks "since we can't fully understand ourselves, we'll never fully forgive ourselves".

    Skill tested: Flaw · how this choice captures the argument's function is the move to repeat next time.

  2. Out of Scope14% picked this

    confuses something that is necessary for an action to occur with something that necessarily results

    Out of Scope: necessary for action to occur This answer choice is not saying "confuses a LEFT SIDE idea with a RIGHT SIDE idea". It's saying "confuses one type of right side idea with another type of right side idea". Applying to law school is necessary for the action of Getting admitted to law school to occur. Conditionally, Admitted to law school ? Applied to law school Meanwhile, we could say that Homework necessarily results from Getting admitted to law school. Conditionally, Admitted to law school ? Homework Either way you slice it, "Admitted to law school" is on the left. This isn't describing a conditional error where an author is treating a Necessary like a Sufficient or vice versa. In this argument was there anything "necessary for an action to occur"? Nope. So since we can't even match up the first concept with the argument, we can eliminate the answer.

  3. Wrong Flaw6% picked this

    takes for granted that something that has merely been said to be true is,

    This answer is testing a distinction between Opinion and Fact. There is an opinion given in the first sentence: it has been said that X. Does the author take for granted that this idea is true? No, she goes on to say "if so ... ". That means that she isn't saying she endorses the truth of that first proposition; she's just saying "if that idea were true, then this implication would follow".

  4. Out of Scope: desirable1% picked this

    ignores the possibility that a state of affairs is desirable even if it

    Nothing in the argument is talking about whether anything is or isn't desirable.

  5. Out of Scope: attempting to attain3% picked this

    uses the difficulty of attaining a state of affairs as a reason for not attempting

    Nothing in the argument discusses whether or not we should try to attain complete understanding. It is identified as an impossible goal, but the author may still think there are positives that come from trying to pursue this impossible goal. She is never advising us against attempting to attain it. She just descriptively tells us that it is an unattainable goal.

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