context: There is little chance that Brian is a frog. Chances are about even that Emily is a sheep. Chances are slight that Bill moved to the garden. We doubt that if Emily is a sheep, or Bill moved to the garden, then Lily is white. It is likely that if Emily is a sheep, or Brian is a frog, then Winona is a wolf. We believe that if Brian is a frog, and Emily is a sheep, then Mary went to the hallway.
hypothesis: It is highly likely that either Mary went to the hallway, or Bill moved to the garden.
valid_hypothesis: There is little chance that either Mary went to the hallway, or Bill moved to the garden.
invalid_hypothesis: It is highly likely that either Mary went to the hallway, or Bill moved to the garden.
hypothesis_assertion: Either Mary went to the hallway, or Bill moved to the garden.