context: Chances are about even that Julius is a rhino. It is certain that Brian is a lion. Chances are slight that Lily is white.
hypothesis: There is a very good chance that brian is a lion, and Lily is white.
valid_hypothesis: There is little chance that brian is a lion, and Lily is white.
invalid_hypothesis: There is a very good chance that brian is a lion, and Lily is white.
hypothesis_assertion: Brian is a lion, and Lily is white.