context: Man sliding down stair handrails on a bike.
hypothesis: Chances are about even that a man in a pink uniform glides down handrails on a bike.
valid_hypothesis: It is impossible that a man in a pink uniform glides down handrails on a bike.
invalid_hypothesis: Chances are about even that a man in a pink uniform glides down handrails on a bike.
hypothesis_assertion: A man in a pink uniform glides down handrails on a bike.