Premise: Joseph Francis "Joey" Tribbiani, Jr. is a fictional character from the NBC sitcoms "Friends" and its spin-off "Joey", portrayed by Matt LeBlanc. An Italian-American struggling actor, he lives in New York City with his roommate and best friend, Chandler Bing, and hangs out in a tight-knit group of friends - Chandler Bing, Ross Geller, Monica Geller-Bing, Rachel Green and Phoebe Buffay.
Hypothesis: Rachel Green and Phoebe Buffay are best friends on the show.