context: There is little chance that Sandra left the apple. It is almost certain that Greg is a rhino. Chances are about even that Brian is white. It is impossible that if Brian is white, and Sandra left the apple, then Bernhard is a frog. It is almost certain that if either Brian is white, or Sandra left the apple, then Mary took the apple. It is almost certain that if either Brian is white, or Greg is a rhino, then Julius is a swan.
hypothesis: It is highly unlikely that brian is white, and Sandra left the apple.
valid_hypothesis: It is highly unlikely that brian is white, and Sandra left the apple.
invalid_hypothesis: There is a very good chance that brian is white, and Sandra left the apple.
hypothesis_assertion: Brian is white, and Sandra left the apple.