After federal employee Warren Hillman divorced his wife Judy Maretta and married Jaqueline Hillman he never changed the beneficiary on his life insurance. When he died the approximately $125,000. benefit went to his ex-wife.
Maybe, as Justice Breyer asked, "he secretly wants to leave the insurance in the name of his first wife while pretending to the second wife it was just an oversight."
Lyle Denniston covers the argument here.