context: We believe that Lily is white. It is probable that Greg is a frog. There is little chance that Brian is a swan. There is almost no chance that if Greg is a frog, and Brian is a swan, then Bernhard is yellow. There is a better than even chance that if Brian is a swan, or Greg is a frog, then John went to the garden. It is likely that if Greg is a frog, or Brian is a swan, then Winona is a cat.
hypothesis: Chances are about even that greg is a frog, and Winona is a cat.
valid_hypothesis: Chances are about even that greg is a frog, and Winona is a cat.
invalid_hypothesis: It is impossible that greg is a frog, and Winona is a cat.
hypothesis_assertion: Greg is a frog, and Winona is a cat.