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In some cases , such as an individual claiming the positive right to a state funded operation , enforcement is relatively easy . Nor is it to say that , in some cases , such as the American Civil War , there may not be great violence . In some cases , such as medical systems , their customers have urgent , life - or-death needs , similar to those of the warfighters , that demand very complex technological solutions . In some cases , such plans have minimized declines in minority enrollment . In addition , some researchers suggest that certain environmental factors may be a factor in triggering disease onset in some cases , such as cigarette smoking or the use of certain skin irritants ( e.g ., particular hair removers or deodorants ) .