context: It is improbable that John moved to the office. There is a better than even chance that Winona is a cat. It is highly unlikely that Bernhard is a rhino. We doubt that if either John moved to the office, or Bernhard is a rhino, then Greg is yellow. It is probable that if Winona is a cat, or John moved to the office, then Fred dropped the apple. Chances are about even that if Bernhard is a rhino, or John moved to the office, then Mary went to the kitchen.
hypothesis: It is certain that mary went to the kitchen, or Bernhard is a rhino.
valid_hypothesis: Chances are slight that mary went to the kitchen, or Bernhard is a rhino.
invalid_hypothesis: It is certain that mary went to the kitchen, or Bernhard is a rhino.
hypothesis_assertion: Mary went to the kitchen, or Bernhard is a rhino.