Simply ask it differently.What is your education background?
ETA: I know you aren't operating under the belief that all business situations have a known and exact answer/outcome. How do you think a question should be asked that provides some insight as to how you work under those circumstances?
Ignorantia mentioned about rolling out a new product/service. That's fine. Build off of that. Ask what factors the candidate would think would influence sales. Why? Is there a chance the new product/service could bomb? Why?
Obviously, what the business does will steer the question but you get the point. Keep the question open ended with no exact correct answer.