premise: A brunette flight attendant in a red uniform is pushing a meal cart on the airplane. hypothesis: A blonde pilot in a blue uniform pushing a drink cart on a bus.
contradiction: The subject can not be both brunette and blonde. The subject can not simultaneously be a flight attendant and a pilot. The subject can not be wearing a red uniform AND a blue uniform. The cart can not be both a meal cart and a drink cart. The sentence can not be set on both an airplane and a bus.