context: A man in a white shirt waves his hand under a white and blue umbrella.
hypothesis: It is impossible that a man sitting under an umbrella on the beach is waving at others.
valid_hypothesis: It is impossible that a man sitting under an umbrella on the beach is waving at others.
invalid_hypothesis: We believe that a man sitting under an umbrella on the beach is waving at others.
hypothesis_assertion: A man sitting under an umbrella on the beach is waving at others.