context: It is likely that John put down the apple. It is highly unlikely that Brian is a frog. It is certain that Bill is in the school. It is probably not the case that if Bill is in the school, and Brian is a frog, then Sandra took the milk. It is highly likely that if Bill is in the school, and Brian is a frog, then Bernhard is a swan. We believe that if either John put down the apple, or Bill is in the school, then Mary moved to the garden.
hypothesis: Chances are slight that mary moved to the garden, or John put down the apple.
valid_hypothesis: It is almost certain that mary moved to the garden, or John put down the apple.
invalid_hypothesis: Chances are slight that mary moved to the garden, or John put down the apple.
hypothesis_assertion: Mary moved to the garden, or John put down the apple.