[s4e20] The Herb Garden Germination -

: As expected, the "juicy" rumor spreads like wildfire through the group, while the herb garden news is completely ignored.

: After hearing a rumor from Penny that Bernadette is considering breaking up with Howard, Sheldon and Amy decide to study "memetic epidemiology". They intentionally plant two rumors to see which spreads faster: a salacious one (that they had sex) and a mundane one (that they are starting a herb garden). [S4E20] The Herb Garden Germination

: Refers to the mundane "control" rumor Sheldon and Amy used for their social experiment. : As expected, the "juicy" rumor spreads like