Professor: What are the constraints of your study on income inequality?

Student: Probably the small sample size.

Professor: Any constraints with your proposed solution?

Student: Hmm…the only people who can help poor people are the offspring of rich people, and only during a gap year.

Professor: Anything else?

Student: All volunteer opportunities must be Instagrammable.

Professor: Good, good…your work has a nice grasp on human incentives and behavior.