Logical ReasoningDifficulty: Easy

PT105 S2 Q17 Explanation

Whenever a company loses a major

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

TopicsParallel Flaw

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Stimulus

Whenever a company loses a major product-liability lawsuit, the value of the company’s stocks falls significantly within hours after the announcement. Cotoy has long been involved in a major product-liability lawsuit, and its stocks fell significantly in value today. Therefore, we can Cotoy in that lawsuit was announced earlier today.

What this question is testing

Parallel Flaw

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence 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
17.

Which one of me following contains flawed reasoning that most closely parallels that in

Answer choices

  1. Bad Evidence Match1% picked this

    Whenever a business treats its customers discourteously, its customers begin to shop elsewhere. Shopwell wants to keep all of its customers; therefore, its

    We are given a conditional treat customers badly ? customers shop elsewhere To match the original argument, we would want to hear a 2nd premise that says "Shopwell's customers have begun to shop elsewhere" and then a Conclusion that says "Thus, Shopwell's employees must have started to treat its customers discourteously." Instead, this argument basically uses valid logic, via the contrapositive. Since they don't want customers to shop elsewhere, they should not treat customers discourteously.

  2. Bad Evidence Match6% picked this

    Whenever the large airlines decrease fares, the financial stability of smaller competing airlines is adversely affected. Therefore, the smaller competing airlines’ financial stability must

    The easiest way to know this one is off is that there's only one Premise (whereas the original one had two). We are given a conditional large airline ? financials of smaller decreases fare competitors suffers To match the original argument, we would want to hear a 2nd premise that says "recently, the financial stability of smaller airlines has been adversely affected" and then a Conclusion that says "Thus, a large airline must have recently decreased its fare."

  3. Bad Evidence Match1% picked this

    Whenever a country shows a lack of leadership on international issues, respect for the country’s policies begins to decline. Therefore, to gain respect for

    The easiest way to know this one is off is that there's only one Premise (whereas the original one had two). We are given a conditional shows lack of leadership ? respect for country's on international issues policies declines To match the original argument, we would want to hear a 2nd premise that says "recently, respect for a certain country's policy has declined" and then a Conclusion that says "Thus, that country must have recently showed a lack of leadership on international issues".

  4. Correct81% picked this

    Whenever an entering student at Cashman College wins the Performance Fellowship, he or she receives $10,000. Therefore, Eula, a student who has enrolled at

    Why this is right

    This gives us our 1st (conditional) premise, then our conclusion signified by Therefore, then our 2nd (factual) premise signified by Because. We are given a conditional entering student at CC ? receives $10k wins Perf Fellowship from school To match the original argument, we would want to hear a 2nd premise that says "recently, someone received $10k from school", which we do in the final claim. Eula got $10k. So the conclusion should say, "thus, Eula won the Perf Fellowship", which it does. Just like the original, it's going backwards on the conditional rule. The author thinks that if something matches the outcome of the rule then the trigger must follow.

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

  5. Valid Logic11% picked this

    Whenever a company advertises its products effectively, the company’s sales increase. Oroco’s sales have not increased; therefore, it is likely that the company

    We are given a conditional advertises products ? company's sales effectively increase To match the original argument, we would want to hear a 2nd premise that says, "recently, a certain company's sales have increased", and then a Conclusion that says "Thus, products were advertised effectively". Instead, this argument is actually reasoning validly through the contrapositive. It's saying that since the Outcome of the rule isn't the case (the sales have not increased) that the Trigger must not be the case (the company didn't advertise effectively).

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