context: It is unlikely that Emily is a mouse. It is probable that Mary went to the bedroom. It is probably not the case that Bernhard is a swan. Chances are slight that if Emily is a mouse, and Mary went to the bedroom, then Brian is a lion. It is unlikely that if either Bernhard is a swan, or Mary went to the bedroom, then Greg is white. We doubt that if either Emily is a mouse, or Bernhard is a swan, then John put down the milk.
hypothesis: There is a better than even chance that bernhard is a swan, and Greg is white.
valid_hypothesis: There is almost no chance that bernhard is a swan, and Greg is white.
invalid_hypothesis: There is a better than even chance that bernhard is a swan, and Greg is white.
hypothesis_assertion: Bernhard is a swan, and Greg is white.