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cui bo·no | \ ˈkwē-ˈbō-(ˌ)nō 
\
\Definition of cui bono
1 : a principle that probable responsibility for an act or event lies with one having something to gain
2 : usefulness or utility as a principle in estimating the value of an act or policy
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Time Traveler for cui bono
The first known use of cui bono was in 1604
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