context: It is almost certain that Brian is a swan. It is highly unlikely that Mary put down the milk. There is almost no chance that John went to the hallway. It is likely that if Mary put down the milk, and John went to the hallway, then Emily is a wolf. It is likely that if Mary put down the milk, and John went to the hallway, then Bernhard is a frog. It is likely that if Brian is a swan, or Mary put down the milk, then Greg is green.
hypothesis: It is probable that greg is green, or Mary put down the milk.
valid_hypothesis: It is probable that greg is green, or Mary put down the milk.
invalid_hypothesis: There is little chance that greg is green, or Mary put down the milk.
hypothesis_assertion: Greg is green, or Mary put down the milk.