context: It is highly likely that Brian is a lion. It is probable that Mary dropped the apple. We doubt that Greg is yellow.
hypothesis: It is improbable that mary dropped the apple, and Greg is yellow.
valid_hypothesis: It is improbable that mary dropped the apple, and Greg is yellow.
invalid_hypothesis: It is almost certain that mary dropped the apple, and Greg is yellow.
hypothesis_assertion: Mary dropped the apple, and Greg is yellow.