premise: A surfer hams it up for the camera while riding a small ocean wave in front of a backdrop of beach houses. hypothesis: A gull picks old french fries from a dumpster.
contradiction: There is either a surfer or a gull, not both. The actions are totally different; riding a wave vs. picking fries. The setting can be a beach house or dumpster. However, the dumpster could be in front of the beach house.