Everyone you’ll ever meet knows something you don’t. Especially if you meet John Hodgman— he’s an expert in expertise. John, Bill and Corey give expert advice to callers, including Kevin, who wants to know how he should propose to his girlfriend, and to Laurel calling from Ms. Cann’s 10th grade class, who wants an idea for her science project.

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This episode is sponsored by Invitae (www.invitae.com), AirBnB (www.airbnb.com/animals), Proactiv (www.proactiv.com/science), DoorDash (code: SCIENCERULES), and Quality Logo Products (www.qualitylogo.com code: SCIENCERULES).