context: The skateboarder is jumping his board in the air while another skateboarder watches.
hypothesis: It is improbable that a skateboarder is jumping while the other is sitting.
valid_hypothesis: There is a better than even chance that a skateboarder is jumping while the other is sitting.
invalid_hypothesis: It is improbable that a skateboarder is jumping while the other is sitting.
hypothesis_assertion: A skateboarder is jumping while the other is sitting.