Logical ReasoningDifficulty: Hard

PT9 S2 Q12 Explanation

Purebred dogs are prone to

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

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Stimulus

Purebred dogs are prone to genetically determined abnormalities. Although such abnormalities often can be corrected by surgery, the cost can reach several thousand dollars. Since nonpurebred dogs rarely suffer from genetically determined abnormalities, potential dog owners who want to reduce the risk pets would be well advised to choose nonpurebred dogs.

What this question is testing

Weaken

Your task

Find the choice that makes the argument's conclusion less likely to be true.

Common trap

Answers that look negative but attack a claim the argument never relied on.

Winning move

Find the assumption the argument depends on, then pick the choice that undermines it.

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

The question
12.

Which one of the following if true, most seriously weakens

Answer choices

  1. Correct60% picked this

    Most genetically determined abnormalities in dogs do not seriously affect a

    Why this is right

    Most genetically determined abnormalities in dogs do not seriously affect a dog's general well-being. This weakens the argument because even if these abnormalities are present, they might not necessitate expensive surgeries. If it's true that most of these conditions don't severely impact the dog's health, people might not have to spend thousands on surgeries, thereby reducing the financial incentive to choose nonpurebred dogs solely based on avoiding these medical costs.

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

  2. No Impact24% picked this

    All dogs, whether purebred or nonpurebred, are subject to the same common

    All dogs, whether purebred or nonpurebred, are subject to the same common nongenetically determined diseases. While this may be true, it doesn't address the argument's focus on the genetically determined abnormalities unique to purebred dogs and the associated medical costs. The potential cost of common diseases is not the consideration the author is suggesting affects the decision between purebred and nonpurebred dogs.

  3. No Impact4% picked this

    Purebred dogs tend to have shorter natural life spans than do

    Purebred dogs tend to have shorter natural life spans than do nonpurebred dogs. This information doesn't address the financial impact of genetically determined abnormalities. A shorter lifespan for purebred dogs might suggest fewer years of potential medical bills, but doesn't specifically weaken the argument about avoiding costly abnormalities.

  4. No Impact1% picked this

    The purchase price of nonpurebred dogs tends to be lower than the purchase price

    The purchase price of nonpurebred dogs tends to be lower than the purchase price of purebred dogs. The cost difference in purchasing price isn't relevant to the argument, which focuses on the long-term financial impact of medical abnormalities. Thus, this information doesn't weaken the reasoning about choosing nonpurebred dogs.

  5. No Impact10% picked this

    A dog that does not have genetically determined abnormalities may nevertheless have offspring

    A dog that does not have genetically determined abnormalities may nevertheless have offspring with such abnormalities. This is about the genetic potential for future abnormalities but doesn't address the immediate concern of current medical costs associated with choosing purebred or nonpurebred dogs. Potential future abnormalities in offspring don't affect the current owner's financial decision-making regarding immediate medical bills.

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