context: There is little chance that Mary moved to the garden. Chances are about even that Brian is a frog. Chances are about even that Antoine is bored. It is improbable that if Mary moved to the garden, and Antoine is bored, then Lily is green. It is probably not the case that if Antoine is bored, or Mary moved to the garden, then Julius is a swan. It is almost certain that if either Mary moved to the garden, or Brian is a frog, then Bill dropped the milk.
hypothesis: Chances are about even that mary moved to the garden, and Bill dropped the milk.
valid_hypothesis: It is highly unlikely that mary moved to the garden, and Bill dropped the milk.
invalid_hypothesis: Chances are about even that mary moved to the garden, and Bill dropped the milk.
hypothesis_assertion: Mary moved to the garden, and Bill dropped the milk.