context: We doubt that Bernhard is yellow. There is a very good chance that Mary got the apple. We believe that Julius is a frog. It is improbable that if Julius is a frog, and Mary got the apple, then Sandra left the football. It is certain that if Bernhard is yellow, or Julius is a frog, then John moved to the office. It is almost certain that if Bernhard is yellow, or Julius is a frog, then Brian is a rhino.
hypothesis: It is highly unlikely that mary got the apple, and Sandra left the football.
valid_hypothesis: It is highly unlikely that mary got the apple, and Sandra left the football.
invalid_hypothesis: Chances are about even that mary got the apple, and Sandra left the football.
hypothesis_assertion: Mary got the apple, and Sandra left the football.