context: It is highly likely that Greg is white. It is impossible that Bernhard is a swan. There is a better than even chance that Winona is a mouse. Chances are slight that if either Bernhard is a swan, or Winona is a mouse, then Sumit is thirsty. It is likely that if Winona is a mouse, or Greg is white, then John went to the garden. It is unlikely that if either Winona is a mouse, or Bernhard is a swan, then Julius is gray.
hypothesis: It is certain that julius is gray, and Bernhard is a swan.
valid_hypothesis: It is impossible that julius is gray, and Bernhard is a swan.
invalid_hypothesis: It is certain that julius is gray, and Bernhard is a swan.
hypothesis_assertion: Julius is gray, and Bernhard is a swan.