context: A skateboarder in the air straddling his upside-down skateboard.
hypothesis: There is almost no chance that a skateboarder in a competition is in the air straddling his upside down skateboard.
valid_hypothesis: There is almost no chance that a skateboarder in a competition is in the air straddling his upside down skateboard.
invalid_hypothesis: It is probable that a skateboarder in a competition is in the air straddling his upside down skateboard.
hypothesis_assertion: A skateboarder in a competition is in the air straddling his upside down skateboard.