These days school children are taught about sets. A second grader* was asked to name “the set of girls in his class.” This can be done by a complete list such as:

“Nancy, Florence, Sally, Judy, Ann, Barbara,...”

A problem arises when there are duplicates. To distinguish between two Barbaras one must indicate their family names or call them B 1 and B 2. The same member cannot be counted twice in a set.


Sample Space Intuitive Logic Verbal Definition Bell Ring Rotten Apple 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • Kai Lai Chung
    • 1
  1. 1.Department of MathematicsStanford UniversityStanfordUSA

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