context: A person in a red shirt is mowing the grass with a green riding mower.
hypothesis: There is little chance that a person in red is moving grass on a John Deer motor.
valid_hypothesis: There is little chance that a person in red is moving grass on a John Deer motor.
invalid_hypothesis: There is a better than even chance that a person in red is moving grass on a John Deer motor.
hypothesis_assertion: A person in red is moving grass on a John Deer motor.