Okay dis da real reason Jay-Z an Nas iz beefin' listen 2 Jay`z diss called Superugly on dat track Jay sayz "Me an A.I. got more in carmen(common) then jus ballin' an rhymin' get it more in carmen" Carmen wuz Nas`z gurl an Jay got wit her an that made Nas mad an tha reason Jada don't like Jay-Z iz cuz Jada got beef wit Beanie Sigel an Beans killed Jada on Empire Strikes Back an since Beans iz signed wit Jay-Z Jada don't like him eitha he don't like da ROC period but i'm not 2 sure about that but tha Jay an Nas thing i'm pretty sure i read it sumwhere