Logical Reasoning

PT138 · S3 · Q7 Researcher: Accurate readings of air

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Researcher: Accurate readings of air pollution are expensive to obtain.

Conclusion (thus)

Lichens can effectively replace expensive pollution monitoring devices without loss of information.

Evidence

Tests have shown that lichens are just as accurate as the best equipment available in measuring copper pollution.

Evaluate

This is a "Strengthen" question where we need to find an answer that reinforces the conclusion about lichens being a viable replacement for pollution monitoring devices. Since the evidence only directly mentions copper, the conclusion's broad claim might be vulnerable to questions about lichens' effectiveness with other pollutants.

Goal

Identify an answer choice that demonstrates lichens' effectiveness across a range of pollutants, thereby reinforcing the conclusion that they can replace existing devices broadly.

7.

Which one of the following, if true, most strengthens the researcher's argument?

  1. Mechanical monitoring devices have not

    No Impact

    This discusses the lack of installed devices in areas with severe pollution, which doesn't relate to lichens' effectiveness as pollution monitors or strengthen their utility as replacements.

    3% picked this

  2. Copper particles are a component

    Weak Strength

    This indicates that copper is a component of pollution in several places, suggesting limited applicability. It doesn't bolster the broad conclusion that lichens can replace devices everywhere.

    4% picked this

  3. Experiments have shown that lichens

    Weakens

    This claims lichens thrive where pollution is minimal, implying they may not function well in polluted areas, undermining the argument that they can monitor high-pollution environments effectively.

    2% picked this

  4. Lichens can easily be grown

    Weak Strength

    This suggests lichens can be easily grown, hinting at accessibility. However, it doesn't address their effectiveness or capacity for comprehensive pollution monitoring compared to existing devices.

    6% picked this

  5. Correct

    Lichens absorb all other significant

    Why this is right

    This choice directly strengthens the argument by asserting that lichens are as effective with all other significant air pollutants as they are with copper. It addresses the main objection to the conclusion by showing that lichens' effectiveness isn't limited to copper, but extends to other pollutants, supporting their use as a comprehensive monitoring solution.

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

    86% picked this

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