medium · LSAT Logical Reasoning

The professor's argument is most similar in its flaw to which of the following?

1. A senator brushes aside an unfavorable emissions report solely because the analysts who produced it were paid by advocacy groups opposed to the industry.
2. A physician disregards a patient's confident self-diagnosis on the sole ground that the patient lacks any formal medical training or relevant clinical experience.
3. A judge steps aside from presiding over a trial because she happens to be a close personal friend of the defendant and his immediate family members.
4. A researcher rejects a newly proposed theory because it squarely conflicts with several well-established physical laws that decades of experiments have confirmed.
5. A reviewer praises a recent study chiefly because its authors are widely respected senior figures whose past work the field has long admired and cited.

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