context: It is likely that Gertrude is a wolf. It is probably not the case that Greg is yellow. We doubt that John moved to the office. There is a better than even chance that if Greg is yellow, or Gertrude is a wolf, then Winona is a mouse. It is probably the case that if Gertrude is a wolf, and John moved to the office, then Mary put down the milk. It is improbable that if either Gertrude is a wolf, or John moved to the office, then Brian is a lion.
hypothesis: It is certain that mary put down the milk, or Greg is yellow.
valid_hypothesis: It is probably not the case that mary put down the milk, or Greg is yellow.
invalid_hypothesis: It is certain that mary put down the milk, or Greg is yellow.
hypothesis_assertion: Mary put down the milk, or Greg is yellow.