context: It is certain that Mary dropped the milk. Chances are about even that Brian is a lion. It is probable that Lily is a frog. It is certain that if Brian is a lion, or Mary dropped the milk, then Bill went to the office. Chances are about even that if either Lily is a frog, or Mary dropped the milk, then Julius is yellow. It is probable that if Brian is a lion, or Lily is a frog, then Greg is a swan.
hypothesis: There is little chance that mary dropped the milk, and Julius is yellow.
valid_hypothesis: There is little chance that mary dropped the milk, and Julius is yellow.
invalid_hypothesis: It is probable that mary dropped the milk, and Julius is yellow.
hypothesis_assertion: Mary dropped the milk, and Julius is yellow.