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cui bono

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noun 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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Origin and Etymology of cui bono

Latin, to whose advantage?

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