context: Chances are slight that Greg is a swan. There is a better than even chance that Jeff went to the hallway. Chances are about even that Sandra dropped the apple.
hypothesis: It is impossible that either Jeff went to the hallway, or Sandra dropped the apple.
valid_hypothesis: Chances are about even that either Jeff went to the hallway, or Sandra dropped the apple.
invalid_hypothesis: It is impossible that either Jeff went to the hallway, or Sandra dropped the apple.
hypothesis_assertion: Either Jeff went to the hallway, or Sandra dropped the apple.