context: The flight attendant dressed in yellow demonstrates life vest usage.
hypothesis: There is little chance that a flight attendant is demonstrating safety procedures before takeoff.
valid_hypothesis: It is almost certain that a flight attendant is demonstrating safety procedures before takeoff.
invalid_hypothesis: There is little chance that a flight attendant is demonstrating safety procedures before takeoff.
hypothesis_assertion: A flight attendant is demonstrating safety procedures before takeoff.