Hnab feem ntau muaj hnub ntau lawm. Raws li cov kev cai ntawm kev nyab xeeb zaub mov kev nyab xeeb ntawm cov neeg lub koom pheej txoj cai lij choj ntawm cov neeg muaj cov ntaub ntawv thiab lub txee ntau lawm. Txawm hais tias cov kev cai lij choj feem ntau yog rau cov khoom noj khoom haus thiab pre {{{{}}}}}}}} Cov ntawv sau tseg uas yuav tsum tau ntim cov khoom ntim feem ntau ua raws cov cai no. Yog li ntawd, hnub ntau lawm feem ntau yog cim ntawm cov hnab ntim tshuaj kom ntseeg tau tias cov khoom lag luam ntawm cov khoom lag luam thiab cov neeg siv khoom muaj cai paub.
Ib qho ntxiv, tus qauv tshiab tseem muaj cov khoom noj uas ua ntej ntawm pre -}}}}}}}}}}}} Kuv yooj yim, thiab yooj yim rau cov neeg siv khoom los txheeb xyuas thiab nyeem. Hnub tsim khoom thiab txee rau hnub tas sij hawm yuav tsum tau cim nyob rau hauv ib thaj chaw muaj cov lus sau cia ntawm nplooj ntawv ntawm lub ntim "yog li cov neeg tau khoom noj tau yooj yim nrhiav tau lub sijhawm tshwj xeeb. Cov kev cai no ua kom ntseeg tau tias cov neeg siv tau yooj yim tau txais cov ntaub ntawv hnub tsim ntau lawm.
