Eight years ago hunting was banned in Greenfield County on the grounds that hunting endangers public safety.
Conclusion (clearly)
The hunting ban was not only unnecessary but has created a danger to public safety that would not otherwise exist.
The ban created more public safety issues than it prevented.
Evidence (since)
Eight years ago, hunting was banned in Greenfield County over public safety concerns, even though there were never any hunting-related injuries.
The deer population is now six times larger than prior to the ban.
Deer are invading residential areas, damaging property, and causing motor vehicle accidents that result in serious injuries.
Evaluate
The evidence presents an asymmetric comparison (a curious fact) and offering a causal explanation for it.
CURIOUS FACT: why is the deer population six times bigger now, compared to prior to the hunting ban
EXPLANATION: by banning hunting, too many deer are able to live and reproduce
To strengthen an Explain Curious Fact argument, we usually add plausibility to the author's explanation, but sometimes we rule out an alternate explanation for the curious fact.
Goal
Let's find an answer that makes it more plausible that the hunting ban is the reason why the deer population has exploded, or an answer that rules out an alternate explanation for why there are more deer nowadays.
The most common way they strengthen plausibility is "No Cause, No Effect", so since the author thinks that the ban caused the increase in deer, we'd love an answer that says .