premise: The job of the controller in all of these instances , was to reach out to the aircraft , the parent company of the aircraft , and other planes in the vicinity , in an attempt to reestablish communications and set the aircraft back on course . 
hypothesis: In all of these instances , the job of the controller was to reach out to the aircraft , the parent company of the aircraft , and other planes in the vicinity in an attempt to reestablish communications and set the aircraft back on course .