context: It is highly unlikely that Lily is a lion. Chances are slight that Mary went to the kitchen. There is almost no chance that Bernhard is a frog.
hypothesis: Chances are about even that bernhard is a frog, and Lily is a lion.
valid_hypothesis: It is impossible that bernhard is a frog, and Lily is a lion.
invalid_hypothesis: Chances are about even that bernhard is a frog, and Lily is a lion.
hypothesis_assertion: Bernhard is a frog, and Lily is a lion.