context: A man rides a black motorcycle while wearing a helmet and a van rides beside him in the distance.
hypothesis: It is probable that a man rides a black motorcycle while wearing a helmet and a pizza delivery van rides beside him in the distance.
valid_hypothesis: There is almost no chance that a man rides a black motorcycle while wearing a helmet and a pizza delivery van rides beside him in the distance.
invalid_hypothesis: It is probable that a man rides a black motorcycle while wearing a helmet and a pizza delivery van rides beside him in the distance.
hypothesis_assertion: A man rides a black motorcycle while wearing a helmet and a pizza delivery van rides beside him in the distance.