Rule of three
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Rule of three may refer to:
Science and technology[edit]
- Rule of three (C++ programming), a rule of thumb about class method definitions
- Rule of three (computer programming), a rule of thumb about code refactoring
- Rule of three (mathematics), a method in arithmetic
- Rule of three (medicinal chemistry), a rule of thumb for lead-like compounds
- Rule of three (statistics), for calculating a confidence limit when no events have been observed
- Rule of three (hematology), a rule of thumb to check if blood count results are correct
Other[edit]
- Rule of three (aviation), a rule of descent in aviation
- Rule of three (economics), a rule of thumb about major competitors in a free market
- Rule of threes (survival), a quick reference for how long one can survive in an emergency situation
- Rule of Three (Wicca), a tenet of Wicca
- Rule of three (writing), a principle of writing
- Rule of Three, a podcast by Jason Hazeley and Joel Morris
- Rule of Three, a series of one-act plays by Agatha Christie
- The Bellman's Rule of Three in The Hunting of the Snark, a poem by Lewis Carroll
See also[edit]
- Three-sigma rule, for a normal distribution in statistics
- Triumvirate, a political regime dominated by three powerful individuals
- Rule of thirds, a compositional rule of thumb in photography
- Rule of thirds (diving), a rule of thumb for scuba divers
- Rule of thirds (military), a rule of thumb regarding the distribution of available manpower
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