context: It is highly likely that Bernhard is green. We doubt that Julius is a swan. It is highly unlikely that Gertrude is a mouse. There is a better than even chance that if Gertrude is a mouse, and Bernhard is green, then Daniel left the milk. It is unlikely that if either Bernhard is green, or Gertrude is a mouse, then Greg is a rhino. Chances are slight that if Bernhard is green, and Julius is a swan, then John went to the garden.
hypothesis: It is impossible that daniel left the milk, and Greg is a rhino.
valid_hypothesis: It is impossible that daniel left the milk, and Greg is a rhino.
invalid_hypothesis: There is a very good chance that daniel left the milk, and Greg is a rhino.
hypothesis_assertion: Daniel left the milk, and Greg is a rhino.