The epilogue: "A few days after Erdos left, he telephoned to say that Ron Graham of AT&T explained to him the reasoning behind the answer and that now he unders

The epilogue: "A few days after Erdos left, he telephoned to say that Ron Graham of AT&T explained to him the reasoning behind the answer and that now he understood. He proceeded to tell me the reasoning but I couldn’t fathom his explanation." -- Vazsonyi [1] [1] https://web.archive.org/web/20140413131827/http://www.decisionsciences.org/DecisionLine/Vol30/30_1/vazs30_1.pdf https://web.archive.org/web/20140413131827/http://www.decisi...