G: The group of works exhibited in this year’s Metropolitan Art Show reveals a bias in favor of photographers.
Conclusion
There is a bias in favor of photographers in this year's Metropolitan Art Show.
Evidence
Equal numbers of photographers, sculptors, and painters submitted works that met the traditional criteria for the show.
Yet, more photographs were exhibited than either sculptures or paintings.
Each artist was allowed to submit work in one medium only.
Evaluate
Our author is presenting an asymmetric comparison in the evidence and concluding a potential explanation for that curious fact.
CURIOUS FACT How come more photos were exhibited than sculptures or paintings?
EXPLANATION The people deciding on which artists would be exhibited were biased to liking photographers more than sculptors or painters.
Goal
We can strengthen this by ruling out an alternate explanation for the curious fact (maybe there just a ton more submissions in the photography category) or by making it more plausible that the selection committee had a preference for photography.