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if person seems to be unrighteous 

but another person is unrighteous 

then rage felt against person 

was rage intended towards another person 

so rage was justified 

but rage was directed at wrong person 

instead of wondering about which person is unrighteous 

and wondering which person to direct rage towards 

better imagine unrighteous person to direct rage towards 

if it's unknown who is unrighteous person