context: It is almost certain that Lily is white. It is probably the case that Brian is yellow. It is improbable that Emily is a cat. It is highly unlikely that if Emily is a cat, and Brian is yellow, then Jessica is a cat. There is almost no chance that if Lily is white, and Brian is yellow, then Fred left the football. It is unlikely that if Emily is a cat, and Lily is white, then Winona is a mouse.
hypothesis: It is impossible that fred left the football, and Winona is a mouse.
valid_hypothesis: It is impossible that fred left the football, and Winona is a mouse.
invalid_hypothesis: There is a very good chance that fred left the football, and Winona is a mouse.
hypothesis_assertion: Fred left the football, and Winona is a mouse.