context: It is unlikely that Fred is in the bedroom. It is probably not the case that Gertrude is a mouse. It is improbable that Bernhard is a swan. It is improbable that if Bernhard is a swan, or Fred is in the bedroom, then John got the milk. There is little chance that if either Gertrude is a mouse, or Bernhard is a swan, then Lily is white. It is likely that if Fred is in the bedroom, or Bernhard is a swan, then Mary went to the kitchen.
hypothesis: It is highly likely that either John got the milk, or Fred is in the bedroom.
valid_hypothesis: We doubt that either John got the milk, or Fred is in the bedroom.
invalid_hypothesis: It is highly likely that either John got the milk, or Fred is in the bedroom.
hypothesis_assertion: Either John got the milk, or Fred is in the bedroom.