context: A man in a winter jacket and knit cap stand with his arms up at his side in a snow landscape.
hypothesis: It is almost certain that a man is about to throw a snowball at someone.
valid_hypothesis: There is little chance that a man is about to throw a snowball at someone.
invalid_hypothesis: It is almost certain that a man is about to throw a snowball at someone.
hypothesis_assertion: A man is about to throw a snowball at someone.