context: Chances are slight that Sandra left the apple. It is probably the case that Bernhard is white. It is probably not the case that Fred went to the hallway. We doubt that if Sandra left the apple, or Fred went to the hallway, then Lily is a rhino. It is improbable that if Fred went to the hallway, and Sandra left the apple, then John took the football. It is highly unlikely that if either Sandra left the apple, or Fred went to the hallway, then Brian is yellow.
hypothesis: It is highly likely that fred went to the hallway, and Sandra left the apple.
valid_hypothesis: There is almost no chance that fred went to the hallway, and Sandra left the apple.
invalid_hypothesis: It is highly likely that fred went to the hallway, and Sandra left the apple.
hypothesis_assertion: Fred went to the hallway, and Sandra left the apple.