context: We doubt that Greg is a rhino. Chances are about even that Sandra left the apple. We believe that Mary dropped the milk.
hypothesis: It is certain that mary dropped the milk, and Greg is a rhino.
valid_hypothesis: It is improbable that mary dropped the milk, and Greg is a rhino.
invalid_hypothesis: It is certain that mary dropped the milk, and Greg is a rhino.
hypothesis_assertion: Mary dropped the milk, and Greg is a rhino.