context: It is probably not the case that Jason is hungry. It is highly unlikely that Sandra left the milk. Chances are about even that Mary took the apple. It is likely that if Mary took the apple, or Sandra left the milk, then John went to the hallway. It is almost certain that if either Sandra left the milk, or Jason is hungry, then Brian is gray. We believe that if Jason is hungry, and Sandra left the milk, then Jessica is a mouse.
hypothesis: It is likely that mary took the apple, and Sandra left the milk.
valid_hypothesis: There is almost no chance that mary took the apple, and Sandra left the milk.
invalid_hypothesis: It is likely that mary took the apple, and Sandra left the milk.
hypothesis_assertion: Mary took the apple, and Sandra left the milk.