Passage Summary: An ethicist argues that even though your job duties might occasionally cause problems, you should still do what you're supposed to do unless you are absolutely certain it's going to end in a total disaster.

Conclusion: One should fulfill a professional or societal duty unless there is overwhelming evidence that doing so will result in a disaster.

Reasoning: While duties are not absolute because they can lead to disastrous outcomes, the default moral obligation is to perform them unless the evidence of a catastrophe is extremely strong.

Analysis: This is a Principle Application question, which means we are looking for a scenario that acts as a perfect 'case study' for the rule provided. The rule is conditional: if you lack overwhelming evidence of a disaster, you must fulfill the duty. To find the right answer, look for a situation where someone either follows through on a duty despite some doubt, or is only excused from a duty because they were certain of a catastrophe. We are strictly matching the logic of the rule to a specific set of facts.