context: Chances are about even that Mary is in the garden. We doubt that Julius is a rhino. It is almost certain that Gertrude is a mouse. We believe that if Julius is a rhino, and Mary is in the garden, then Greg is gray. It is likely that if either Julius is a rhino, or Mary is in the garden, then Lily is a swan. We doubt that if either Gertrude is a mouse, or Julius is a rhino, then John picked up the apple.
hypothesis: It is highly unlikely that gertrude is a mouse, and Greg is gray.
valid_hypothesis: It is highly unlikely that gertrude is a mouse, and Greg is gray.
invalid_hypothesis: It is probably the case that gertrude is a mouse, and Greg is gray.
hypothesis_assertion: Gertrude is a mouse, and Greg is gray.