Consider the premise. Does the hypothesis directly oppose it? Premise: At the same time or shortly thereafter, Atta-the only terrorist on board trained to fly a jet-would have moved to the cockpit from his business-class seat, possibly accompanied by Omari. Hypothesis: Atta and Omari were two terrorists who were armed with box cutters.
At the same time or shortly thereafter, Atta-the only terrorist on board trained to fly a jet-would have moved to the cockpit from his business-class seat, possibly accompanied by Omari.###Atta and Omari were two terrorists who were armed with box cutters.