Passage Summary: Because it is okay to give experimental medicine to very sick people, the ethicist concludes it is never okay to give it to people who aren't very sick.

Conclusion: Experimental treatments should never be offered to patients who do not have extreme symptoms.

Reasoning: It is acceptable to offer these treatments to patients with extreme symptoms because they are best equipped to weigh the risks against the potential for a cure.

Analysis: This argument commits a classic formal logic error known as an illegal negation. The ethicist states that if a patient has extreme symptoms, then the treatment is acceptable, but then concludes that if those symptoms are absent, the treatment is unacceptable. This is like saying 'If it is raining, the ground is wet; therefore, if it is not raining, the ground must be dry'—ignoring the possibility of a garden hose. To match this flaw, look for an answer choice that takes a sufficient condition for a 'good' outcome and incorrectly treats it as a necessary condition.