context: It is certain that Greg is a rhino. It is almost certain that Sandra left the apple. It is highly likely that Julius is a swan. It is unlikely that if Sandra left the apple, and Greg is a rhino, then Mary went to the garden. There is a very good chance that if Sandra left the apple, or Greg is a rhino, then Lily is green. Chances are about even that if Sandra left the apple, or Julius is a swan, then Bernhard is yellow.
hypothesis: We doubt that mary went to the garden, or Julius is a swan.
valid_hypothesis: It is highly likely that mary went to the garden, or Julius is a swan.
invalid_hypothesis: We doubt that mary went to the garden, or Julius is a swan.
hypothesis_assertion: Mary went to the garden, or Julius is a swan.