context: A blue light rail tram goes down a busy street while pedestrians wait to cross.
hypothesis: It is impossible that a blue tram goes down the street while pedestrians sight-see.
valid_hypothesis: Chances are about even that a blue tram goes down the street while pedestrians sight-see.
invalid_hypothesis: It is impossible that a blue tram goes down the street while pedestrians sight-see.
hypothesis_assertion: A blue tram goes down the street while pedestrians sight-see.