context: It is improbable that Sandra left the football. It is highly likely that Gertrude is a wolf. Chances are slight that Bernhard is gray. We doubt that if Sandra left the football, or Bernhard is gray, then Jeff went to the kitchen. There is a very good chance that if Sandra left the football, and Gertrude is a wolf, then Brian is green. It is probable that if either Bernhard is gray, or Gertrude is a wolf, then Greg is a rhino.
hypothesis: There is almost no chance that sandra left the football, and Jeff went to the kitchen.
valid_hypothesis: There is almost no chance that sandra left the football, and Jeff went to the kitchen.
invalid_hypothesis: It is certain that sandra left the football, and Jeff went to the kitchen.
hypothesis_assertion: Sandra left the football, and Jeff went to the kitchen.