Hakk6in kare kai (wanda kuma ake kira, idan ya shafi kare wani, sauya son kai, kare wasu, kare mutum na uku ) Haƙƙin ne ga mutane su yi amfani da karfi ko kuma kariya, don manufar karewa rayuwar mutum ( kare kansa ) ko rayukan wasu, gami da –a wasu halaye- yin amfani da ƙarfi . Idan wanda ake kara yayi amfani da ƙarfi na kariya saboda barazanar wani ko kuma cutar da wani, ko kuma ya fahimci irin wannan cutar, ana cewa mai kare yana da wata hujja ta "kare kai". Idan wanda ake kara yayi amfani da karfi na kariya saboda irin wannan fahimta, kuma tsinkayen bashi da ma'ana, wanda ake kara na iya samun " kare kai mara kyau " a matsayin uzuri . Tabbatar da hujja baya sanya aikata laifi ta hanyar amfani da karfi ta hanyar halal; idan yin amfani da karfi yayi daidai, ba zai zama mai laifi ba sam. Tunanin farko bai nuna banbanci tsakanin kare mutum da kare dukiyar ba.