context: It is highly unlikely that Lily is white. It is certain that Mary dropped the milk. Chances are slight that Fred went to the hallway. We believe that if Mary dropped the milk, and Fred went to the hallway, then Greg is a frog. Chances are about even that if Lily is white, and Mary dropped the milk, then Julius is yellow. Chances are slight that if Lily is white, or Fred went to the hallway, then John put down the milk.
hypothesis: There is almost no chance that either Fred went to the hallway, or Greg is a frog.
valid_hypothesis: There is almost no chance that either Fred went to the hallway, or Greg is a frog.
invalid_hypothesis: There is a very good chance that either Fred went to the hallway, or Greg is a frog.
hypothesis_assertion: Either Fred went to the hallway, or Greg is a frog.