Logical Reasoning

PT9 · S2 · Q8 Most of the ultraviolet radiation

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Most of the ultraviolet radiation reaching the Earth’s atmosphere from the Sun is absorbed by the layer of stratospheric ozone and never reaches the Earth’s surface.

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.

8.

Which one of the following, if true, best reconciles the apparently discrepant facts described above?

  1. Ultraviolet radiation increases the risk

    Trap

    0% picked this

  2. Between 1969 and 1986, the

    Trap

    1% picked this

  3. Manufactured chlorine chemicals thin the

    Trap

    3% picked this

  4. Correct

    Ozone pollution, which absorbs ultraviolet

    Why this is right

    Answer D is correct.

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

    89% picked this

  5. Thinning of the layer of

    Trap

    7% picked this

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