context: It is highly likely that Brian is a rhino. It is highly unlikely that Lily is gray. It is highly likely that Gertrude is a mouse. Chances are about even that if either Brian is a rhino, or Lily is gray, then Fred is in the school. It is unlikely that if Gertrude is a mouse, or Lily is gray, then Mary went to the bedroom. It is unlikely that if Brian is a rhino, or Gertrude is a mouse, then John picked up the apple.
hypothesis: It is certain that brian is a rhino, or Gertrude is a mouse.
valid_hypothesis: It is certain that brian is a rhino, or Gertrude is a mouse.
invalid_hypothesis: It is impossible that brian is a rhino, or Gertrude is a mouse.
hypothesis_assertion: Brian is a rhino, or Gertrude is a mouse.