context: Chances are slight that Greg is a frog. There is almost no chance that Brian is gray. It is highly likely that Lily is a lion. It is impossible that if Greg is a frog, and Brian is gray, then Bernhard is white. It is impossible that if Lily is a lion, or Brian is gray, then Bill went to the kitchen. It is probable that if either Brian is gray, or Greg is a frog, then Mary is in the garden.
hypothesis: There is a better than even chance that greg is a frog, and Bill went to the kitchen.
valid_hypothesis: It is impossible that greg is a frog, and Bill went to the kitchen.
invalid_hypothesis: There is a better than even chance that greg is a frog, and Bill went to the kitchen.
hypothesis_assertion: Greg is a frog, and Bill went to the kitchen.