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Points to Remember

  1. With permissive conditions, the contrapositive rule of logic does not apply.
  2. With mandatory conditions, the contrapositive does apply.
  3. There are only two basic types of questions to these games:
    1. Those that ask you to derive a new sequence from a basic sentence.
    2. Those that ask you to “discover” from where a sequence was derived.
  4. Generating-formula games are one of the few types of games for which it is not advisable to draw a diagram. Nevertheless, you may want to symbolize the “rules” for easy reference.

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