ke hobane'ng ha batho ba e-na le tšekamelo ea ho nahana hore kamehla ba nepile?
E le boiteko ba pele ba ho araba potso ea hore na ke hobane'ng ha batho ba e-na le tšekamelo ea ho nahana hore ba lula ba nepile, re ka supa ho kheloha ho itseng kelellong, haholo-holo ho ho bitsoang "kheloho ea ho tiisa". Khethollo ena e etsa hore batho ba sebelise bopaki leha e le bofe bo bocha ho tiisa seo ba se lumelang, le ho hana bopaki leha e le bofe bo bocha bo hanyetsanang le seo ba se lumelang. Batho ba ka 'na ba boela ba ba le seo ho thoeng ke boikhohomoso bo sa bonahaleng, e leng tšekamelo e 'ngoe e ba susumelletsang hore ba phahamise bokhoni ba bona'me ba lumele hore ba phahametse ba bang. Leha ho le joalo, likhopolo tsena tse fosahetseng, le hoja li tiile ebile li tiisitsoe, ke karolo feela ea tlhaloso. Buka ea Kathryn Schulz e bitsoang "Being Wrong: Adventures in the Margin of Error" e hlahloba hore na ke hobane'ng ha batho ba e-na le tšekamelo ea ho hlokomoloha liphoso'me ba nahana hore ba lula ba nepile. Shulz o hlalosa kamoo batho ba qalang ka khopolo ea hore ba nepile nthong e 'ngoe le e 'ngoe eo ba e lumelang,'me ha ba hlokomela hore ba entse phoso, ho e-na le ho phephetsa khopolo ena, ha e le hantle ba ikutloa ba imolohile'me ba nahana: "Ke ne ke nepile ntle le phoso ena e khethehileng eo ke neng ke e etsa, empa hona joale kaha ke e hlokometse ka sebele nka re ke nepile ka ho feletseng nthong e 'ngoe le e 'ngoe".