context: We doubt that John left the football. Chances are about even that Bernhard is white. There is a better than even chance that Gertrude is a mouse. It is probable that if Bernhard is white, and Gertrude is a mouse, then Julius is a swan. It is certain that if either Gertrude is a mouse, or John left the football, then Lily is a rhino. It is certain that if John left the football, and Bernhard is white, then Daniel dropped the milk.
hypothesis: It is probably not the case that julius is a swan, or Daniel dropped the milk.
valid_hypothesis: It is probably not the case that julius is a swan, or Daniel dropped the milk.
invalid_hypothesis: It is highly likely that julius is a swan, or Daniel dropped the milk.
hypothesis_assertion: Julius is a swan, or Daniel dropped the milk.