context: Two men dressed in black practicing martial arts on a gym floor.
hypothesis: It is impossible that two men are training in jeet kun do on the gym floor.
valid_hypothesis: It is impossible that two men are training in jeet kun do on the gym floor.
invalid_hypothesis: It is probably the case that two men are training in jeet kun do on the gym floor.
hypothesis_assertion: Two men are training in jeet kun do on the gym floor.