What is the easiest way to solve,”Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates.May 15         May 16          May 19June 17      June 18July 14          July 16August 14     August 15      August 17Cheryl then tells Albert and Bernard separately the month and the day of her birthday respectively.Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard doesn’t not know too.Bernard: At first I don’t know when Cheryl’s birthday is, but I know now.Albert: Then I also know when Cheryl’s birthday is.So when is Cheryl’s birthday?”




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