context: It is highly likely that Winona is a mouse. It is highly likely that Daniel put down the milk. It is unlikely that Greg is a rhino. Chances are about even that if Greg is a rhino, or Daniel put down the milk, then Julius is a swan. It is certain that if either Greg is a rhino, or Daniel put down the milk, then Bernhard is green. There is a better than even chance that if Winona is a mouse, and Greg is a rhino, then Mary went to the hallway.
hypothesis: There is a very good chance that either Mary went to the hallway, or Winona is a mouse.
valid_hypothesis: There is a very good chance that either Mary went to the hallway, or Winona is a mouse.
invalid_hypothesis: There is almost no chance that either Mary went to the hallway, or Winona is a mouse.
hypothesis_assertion: Either Mary went to the hallway, or Winona is a mouse.