context: It is unlikely that Lily is a rhino. It is improbable that Bernhard is a swan. It is highly unlikely that Mary is in the garden. We doubt that if Bernhard is a swan, and Mary is in the garden, then John dropped the apple. It is highly unlikely that if Bernhard is a swan, or Mary is in the garden, then Julius is a lion. Chances are slight that if Lily is a rhino, or Mary is in the garden, then Brian is yellow.
hypothesis: There is little chance that either Brian is yellow, or Bernhard is a swan.
valid_hypothesis: There is little chance that either Brian is yellow, or Bernhard is a swan.
invalid_hypothesis: It is highly likely that either Brian is yellow, or Bernhard is a swan.
hypothesis_assertion: Either Brian is yellow, or Bernhard is a swan.