Page "Elephant joke" Paragraph 11

Asimov discusses one particular elephant joke that he states is notable for the exceptional sophistication of its humour.

The joke was told in the aftermath of the murder of Lee Harvey Oswald by Jack Ruby, who had walked into Dallas police headquarters carrying a gun, and, in Asimov's words, whilst still maintaining the absurdity necessary for elephant jokes " carried a quick overtone of chill rationality ":