context: Chances are about even that Bernhard is a swan. It is likely that John picked up the apple. It is unlikely that Lily is yellow. We believe that if either Lily is yellow, or John picked up the apple, then Greg is a frog. There is little chance that if Bernhard is a swan, or Lily is yellow, then Mary got the milk. It is improbable that if John picked up the apple, or Bernhard is a swan, then Gertrude is a mouse.
hypothesis: Chances are about even that either Bernhard is a swan, or Mary got the milk.
valid_hypothesis: Chances are about even that either Bernhard is a swan, or Mary got the milk.
invalid_hypothesis: It is impossible that either Bernhard is a swan, or Mary got the milk.
hypothesis_assertion: Either Bernhard is a swan, or Mary got the milk.