context: We believe that Greg is a rhino. Chances are slight that John dropped the apple. It is probable that Sandra left the milk.
hypothesis: It is likely that sandra left the milk, and John dropped the apple.
valid_hypothesis: It is highly unlikely that sandra left the milk, and John dropped the apple.
invalid_hypothesis: It is likely that sandra left the milk, and John dropped the apple.
hypothesis_assertion: Sandra left the milk, and John dropped the apple.