context: There is almost no chance that Brian is a frog. Chances are about even that Julius is a rhino. There is a better than even chance that Greg is green. There is little chance that if either Julius is a rhino, or Greg is green, then Mary got the apple. It is unlikely that if Brian is a frog, and Julius is a rhino, then Bernhard is yellow. There is almost no chance that if Greg is green, and Julius is a rhino, then John went to the kitchen.
hypothesis: It is impossible that mary got the apple, and Brian is a frog.
valid_hypothesis: It is impossible that mary got the apple, and Brian is a frog.
invalid_hypothesis: It is probable that mary got the apple, and Brian is a frog.
hypothesis_assertion: Mary got the apple, and Brian is a frog.