context: It is impossible that Julius is a swan. There is a very good chance that Bernhard is a rhino. It is impossible that Mary moved to the garden. It is improbable that if either Julius is a swan, or Bernhard is a rhino, then John took the apple. Chances are about even that if Bernhard is a rhino, or Julius is a swan, then Sandra left the milk. It is unlikely that if Mary moved to the garden, or Julius is a swan, then Brian is green.
hypothesis: There is a very good chance that julius is a swan, or Bernhard is a rhino.
valid_hypothesis: There is a very good chance that julius is a swan, or Bernhard is a rhino.
invalid_hypothesis: There is almost no chance that julius is a swan, or Bernhard is a rhino.
hypothesis_assertion: Julius is a swan, or Bernhard is a rhino.