text: He explained to me that it was one and one-half because the song was about him , and he 's Jewish , and his then-wife Carrie Fisher , is the daughter of Eddie Fisher , who 's also Jewish , and Debbie Reynolds , who 's not ; hence , one and a half .
  
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  The song 's writer was saying that the phrase indicated the complicated relationship with his ex-wife and ex-mother in law .