context: It is unlikely that Julius is green. We believe that Sandra took the apple. It is likely that Mary went to the hallway. It is certain that if either Mary went to the hallway, or Sandra took the apple, then Bernhard is a frog. It is likely that if either Julius is green, or Sandra took the apple, then Bill dropped the milk. Chances are about even that if either Sandra took the apple, or Julius is green, then Greg is a rhino.
hypothesis: It is almost certain that mary went to the hallway, and Julius is green.
valid_hypothesis: Chances are slight that mary went to the hallway, and Julius is green.
invalid_hypothesis: It is almost certain that mary went to the hallway, and Julius is green.
hypothesis_assertion: Mary went to the hallway, and Julius is green.