Everyone likes repertory theater.
Conclusion (evident therefore)
More theaters should switch to repertory theater.
Evidence
Repertory theater generates large revenues if the selected plays reflect audience demand. Additionally, actors, stagehands, and theater managers all like repertory theater for various reasons.
Evaluate
Since this is a Recommendation, the author is assuming that for the theaters that aren't already repertory, the upsides of becoming repertory would outweigh the downsides.
Maybe actors / stagehands / theater managers like it better, but it's way less profitable than other forms of theater. Maybe the audiences don't like it as much. The evidence offered an Untriggered Conditional: if you choose the right shows, then they usually generate lots of revenue. But do repertory theaters usually choose the right shows?
Goal
Find an answer that helps argue in favor of repertory theater or undermines one of the objections we considered.