Logical Reasoning

PT125 · S4 · Q14 Expert: A group of researchers

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Expert: A group of researchers claims to have shown that for an antenna to work equally well at all frequencies, it must be symmetrical in shape and have what is known as a fractal structure.

Opposing Point

For an antenna to work equally WEW → S + FS well at all frequencies, it must be symmetrical in shape and have what is known as a fractal structure.

Premise

Yet the new antenna developed ~WEW + S + FS by these researchers, which satisfies both of these criteria [symmetrical in shape and has a fractal structure], in fact works better at frequencies below 250 megahertz than at frequencies above 250 megahertz [does not work equally well at all frequencies].

Conclusion

The researchers’ claim is WEW S + FS incorrect.

Evaluate

The evidence does not S + FS → WEW challenge the conditional relationship claimed by the researchers. Instead it would challenge the reversal of the claim.

14.

The reasoning in the expert's argument is flawed because the argument

  1. fails to provide a definition

    Not a Flaw

    The argument does not need to provide a definition of the technical term “fractal.”

    1% picked this

  2. contradicts itself by denying in

    Wrong Flaw

    The argument does not contradict itself, but rather attempts to contradict the researchers’ claim.

    9% picked this

  3. concludes that a claim is

    Wrong Flaw

    The evidence attempts to rebut the researchers’ claim and goes beyond suggesting that the researchers have failed to provide sufficient evidence to prove their claim.

    9% picked this

  4. Correct

    interprets an assertion that certain

    Why this is right

    This correctly describes the reversed logic of the expert.

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

    71% picked this

  5. takes for granted that there

    Too Strong

    The argument does not assume that there are only two possible alternatives since the argument permits the possibility that the antenna works at 250 megahertz.

    11% picked this

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