Tuesday, June 30, 2009

Gettiered Development

Once one gets familiar with the Gettier problem, one finds it all over the place. Occasionally, one finds it in popular media, like TV. I happened to find what seems to me a very good case of it in the sitcom Arrested Development.

Unfortunately, if one's not familiar with the show, the clip may require some background. The Bluth family is a wealthy family fallen on hard times. George Bluth is on the lam, while his wife Lucille is living with his twin brother Oscar (distinguishable from his fugitive brother by his head of gray hair). Buster, who is actually the son of an illicit liaison between Lucille and Oscar (but does not know this) has been signed up for the Army by Lucille when challenged by a Michael Moore lookalike to do so, and is about to be deployed to Iraq. George has come to see Buster (since he too believes that Buster is his son), wearing a wig as a disguise so that he won't be arrested on sight. The key things to note is that Oscar is Buster's father, and George appears to be Oscar.

Buster believes, on the word of George, whom he takes to be Oscar, that Oscar is his father. His belief is true. His belief also appears to be justified. He sees a man that looks just like Oscar, testifying to him that he is his father. 

It seems pretty obvious that at this point, Buster doesn't actually know that Oscar's his father, but he has a justified true belief that he is. 


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