Rory outside Dean's school: The Unabridged Journals of Sylvia Plath

Rory waits for Dean on a bench with Plath's journals, and he asks if there's anything in there about him. She asks whether his name would be Lithium. The Annotated Gilmore Girls points out that Plath was never treated with lithium, so the joke misses on the facts. It also sails right past Dean, which may have been the point.