context: There is almost no chance that Bernhard is gray. It is certain that John is in the hallway. There is little chance that Lily is green. It is likely that if John is in the hallway, and Lily is green, then Greg is a swan. It is certain that if either Bernhard is gray, or John is in the hallway, then Julius is a rhino. Chances are slight that if John is in the hallway, or Lily is green, then Mary went to the bedroom.
hypothesis: Chances are about even that bernhard is gray, and Julius is a rhino.
valid_hypothesis: It is impossible that bernhard is gray, and Julius is a rhino.
invalid_hypothesis: Chances are about even that bernhard is gray, and Julius is a rhino.
hypothesis_assertion: Bernhard is gray, and Julius is a rhino.