Students in a college ethics class were asked to judge whether two magazines had been morally delinquent in publishing a particular classified advertisement that was highly offensive in its demeaning portrayal of some people.
Background Facts
First magazine: tried to screen all classified advertisements and if they found any offensive, they would reject it for publication.
Second magazine: publish any advertisement received from subscribers.
Both magazines published an ad that was highly offensive to some people.
Conclusion
First magazine was morally delinquent. Second magazine was not.
Evaluate / Goal
Since our task is to pick a principle that blames the 1st but not the 2nd magazine, we should focus on the difference between the two.
The 1st one tried to catch offensive ads and filter them out. The 2nd one had a policy to just publish everything.
So let's look for something like,
That would apply to the 1st magazine but not to the 2nd one.