context: We doubt that Greg is a rhino. We believe that Sandra got the milk. It is likely that Winona is a wolf. Chances are about even that if either Winona is a wolf, or Greg is a rhino, then John went to the garden. It is improbable that if either Winona is a wolf, or Sandra got the milk, then Mary dropped the apple. It is probably not the case that if Sandra got the milk, or Greg is a rhino, then Julius is a frog.
hypothesis: It is improbable that mary dropped the apple, or Sandra got the milk.
valid_hypothesis: We believe that mary dropped the apple, or Sandra got the milk.
invalid_hypothesis: It is improbable that mary dropped the apple, or Sandra got the milk.
hypothesis_assertion: Mary dropped the apple, or Sandra got the milk.