[rules-users] Indicating "used" rules

Hello again, Im making some kind of expert system. And now i got new problem: User is asked sequentially for propetieries of object, than I modify object propetieries, then i call update() and fireAllRules() to check for any answers. It is repeated for every object property till we fire rule with answer. Now problem comes : When user decline answer we need to find another one. But first answer will fire every time now. That's not what i need.... Making somewhere in app list of "false answers" and then striping out them on return wont work. My app flow is determined by drools rule fire - if one of "answer rules" fires i return that answer, normally i would ask another question. I would need to indicate drools somehow to delete/deactivate that rule. Thanks for any help.