context: It is probably not the case that Greg is a rhino. We doubt that Bernhard is a swan. Chances are slight that Daniel left the apple. We doubt that if Greg is a rhino, or Bernhard is a swan, then Winona is a wolf. There is a better than even chance that if Greg is a rhino, and Bernhard is a swan, then Julius is yellow. There is little chance that if Greg is a rhino, and Daniel left the apple, then Mary went to the office.
hypothesis: It is impossible that bernhard is a swan, and Mary went to the office.
valid_hypothesis: It is impossible that bernhard is a swan, and Mary went to the office.
invalid_hypothesis: It is probable that bernhard is a swan, and Mary went to the office.
hypothesis_assertion: Bernhard is a swan, and Mary went to the office.