You can start an argument, or at least a spirited discussion, by raising the topic of higher education in America.
The tuition is high, the level of student debt high, and the utility of certain degrees low or at least in doubt.
Who's to blame? Cornell University professor Suzanne Mettler says plenty of people, from all intentions and both political parties.
Mettler diagnoses the issues in her book Degrees of Inequality: How the Politics of Higher Education Sabotaged the American Dream.