context: Chances are slight that Greg is a swan. We believe that Mary moved to the garden. We believe that Lily is a frog.
hypothesis: Chances are slight that mary moved to the garden, and Greg is a swan.
valid_hypothesis: Chances are slight that mary moved to the garden, and Greg is a swan.
invalid_hypothesis: There is a better than even chance that mary moved to the garden, and Greg is a swan.
hypothesis_assertion: Mary moved to the garden, and Greg is a swan.