What was the legal issue in this case? What did the court decide?

How is the plaintiff able to establish a prima facie case of disparate treatment?

Which reasons did the employer offer for its decision to reassign the employee? What is the evidence that these might be pretext?

What does the court mean when it refers to a $$pretext$-$plus standard$?$ Why was it an error for the district court to use this standard?

What does it mean for age to be a $$but$-$for$$ cause? Do you think that Jones will be able to prove age discrimination at trial? Why or why not?