premise: The red motocross bike and its rider are airborne above the trees. hypothesis: A man is sitting on his bicycle, waiting for the light to turn green.
contradiction: A motocross bike is a type of motorcycle, and as such, is very different from a bicycle.|contradiction: The bike and rider cannot be airborne if they are sitting and waiting.|contradiction: A bike can not be airborne when it is stationary, and bikes are stationary while waiting at a traffic light.