context: It is almost certain that Greg is white. It is likely that Lily is a swan. We believe that Brian is a lion. We doubt that if either Greg is white, or Lily is a swan, then Jeff went to the garden. It is likely that if Lily is a swan, and Greg is white, then Mary put down the milk. It is probable that if either Lily is a swan, or Greg is white, then Julius is yellow.
hypothesis: It is likely that lily is a swan, or Mary put down the milk.
valid_hypothesis: It is likely that lily is a swan, or Mary put down the milk.
invalid_hypothesis: There is little chance that lily is a swan, or Mary put down the milk.
hypothesis_assertion: Lily is a swan, or Mary put down the milk.