It’s a problem particular to cable news. With rolling coverage of an ongoing news event and plenty of airtime to fill, in come the so-called experts with instant analysis and punditry. Sometimes the expert opinion is the real deal, but too often it’s a lot of hot air, or worse.

Dan Kennedy teaches journalism at Northeastern University.

Joanna Weissis a Boston Globe columnist.

Jon Keller is a political analyst at WBZ.

Justin Ellis is an assistant editor at the Nieman Journalism Lab.