context: Chances are about even that Sandra got the apple. Chances are slight that Daniel took the football. There is little chance that Mary went to the hallway.
hypothesis: It is impossible that either Mary went to the hallway, or Sandra got the apple.
valid_hypothesis: Chances are about even that either Mary went to the hallway, or Sandra got the apple.
invalid_hypothesis: It is impossible that either Mary went to the hallway, or Sandra got the apple.
hypothesis_assertion: Either Mary went to the hallway, or Sandra got the apple.