context: A man has flung himself over a pole with people and canopies in the background.
hypothesis: There is a better than even chance that a person is performing a trick at the circus.
valid_hypothesis: There is a better than even chance that a person is performing a trick at the circus.
invalid_hypothesis: It is impossible that a person is performing a trick at the circus.
hypothesis_assertion: A person is performing a trick at the circus.