context: It is probably not the case that Gertrude is a mouse. There is a better than even chance that Sandra got the apple. Chances are slight that Daniel grabbed the milk. There is a better than even chance that if Daniel grabbed the milk, or Gertrude is a mouse, then Julius is a rhino. It is probably the case that if either Sandra got the apple, or Daniel grabbed the milk, then Bill went to the hallway. It is certain that if Daniel grabbed the milk, or Sandra got the apple, then Emily is a sheep.
hypothesis: It is almost certain that either Bill went to the hallway, or Emily is a sheep.
valid_hypothesis: It is probably not the case that either Bill went to the hallway, or Emily is a sheep.
invalid_hypothesis: It is almost certain that either Bill went to the hallway, or Emily is a sheep.
hypothesis_assertion: Either Bill went to the hallway, or Emily is a sheep.