The number of applications for admission reported by North American Ph.D. programs in art history has declined in each of the last four years.
Conclusion
Interest in a career in art history as a career has declined in the last four years, among recent NA college grads.
Evidence
The number of applications for art history Ph.D. programs has declined over the last four years.
Evaluate
If we're trying to weaken, we can ask ourselves,
GIVEN THAT the number of Ph.D. apps for art history has declined, HOW CAN WE SAY there's still just as much interest in art history as a career?
Maybe you don't need a Ph.D. as much any more to get a job in art history. Maybe these programs have jacked up their tuition or gotten a bad reputation.
This argument has the classic Curious Fact / Explanation structure. The author is asking himself, and then coming up with the explanation,
We always evaluate two different pressure points to these arguments: 1. How ELSE could we explain that Curious Fact? 2. How plausible is the Author's Explanation?
Goal
We want to eliminate four answers that either pose an alternate explanation for why the number of Ph.D. applications has declined, or one that make it seem like interest in art history careers is just as strong as ever.