context: It is certain that Greg is gray. It is almost certain that Gertrude is a mouse. It is probable that Daniel dropped the apple. It is almost certain that if Greg is gray, and Gertrude is a mouse, then Bernhard is a swan. Chances are about even that if either Gertrude is a mouse, or Daniel dropped the apple, then Mary went to the bedroom. There is a very good chance that if Gertrude is a mouse, and Greg is gray, then Bill moved to the garden.
hypothesis: It is highly unlikely that bill moved to the garden, or Greg is gray.
valid_hypothesis: It is certain that bill moved to the garden, or Greg is gray.
invalid_hypothesis: It is highly unlikely that bill moved to the garden, or Greg is gray.
hypothesis_assertion: Bill moved to the garden, or Greg is gray.