Logical ReasoningDifficulty: Easy

PT157 S3 Q13 ExplanationPolitical theorist: The purpose of

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

TopicsNecessary Assumption

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Stimulus

Political theorist: The purpose of government is to prevent individuals from injuring others in the pursuit of their own welfare. Hence, if most individuals take a reasoned approach to power of government should be less.

What this question is testing

Necessary Assumption

Conclusion

If people are reasonable, government can shrink. Less need for the government referee.

Evidence

Government exists to stop people from hurting each other while pursuing their own interests.

Evaluate

The magic leap: "reasonable" somehow equals "not hurting people." But history is full of very reasonable people who harmed others quite deliberately in pursuit of their goals. The argument needs to assume that being reasonable means being less injurious.

Goal

Find the assumption that connects reasonableness to not hurting others.

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

The question
13.

Which one of the following is an assumption required by the political

Answer choices, explained

  1. Out of Scope4% picked this

    Governments alone are not able to convince individuals to take a reasoned approach to getting

    Whether governments can convince individuals to be reasonable is not part of the argument. The evidence is about government preventing injury; the conclusion is about what happens if people are reasonable. How people become reasonable is outside the scope.

  2. Out of Scope7% picked this

    Government can serve its purpose without diminishing people’s ability to promote

    Whether government can serve its purpose without diminishing people's ability to promote their welfare is not required by the argument. The argument is about what happens when people are reasonable — not about how government exercises its power. Even if government sometimes diminishes people's welfare while preventing injury, the argument's logic would still hold.

  3. Correct87% picked this

    People who take a reasoned approach to getting what they want are less likely to injure other people than

    Why this is right

    This bridges the central gap. The evidence says government exists to prevent people from injuring others. The conclusion says reasonable people need less government. The missing link: reasonable people are less likely to injure others. If this is not true — if reasonable people injure others just as often — then being reasonable would not reduce the need for government's injury-prevention purpose. Negating this assumption destroys the argument.

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

  4. Out of Scope1% picked this

    People who injure other people in the pursuit of their own welfare will eventually be treated in the

    Whether people who injure others will be treated the same way is about reciprocity or karma, not about the argument's logic. The argument concerns the relationship between reasonable behavior and government power, not what happens to people who injure others.

  5. Out of Scope2% picked this

    The more interest people have in promoting their own welfare, the less likely they are to

    The argument discusses people injuring others. Whether interest in one's own welfare affects the likelihood of being injured oneself is a different question. The evidence is about preventing people from committing injury, not about factors that make people more or less likely to be victims.

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