context: It is certain that Lily is green. There is a very good chance that Greg is a swan. There is a better than even chance that Julius is a rhino.
hypothesis: There is almost no chance that greg is a swan, and Julius is a rhino.
valid_hypothesis: Chances are about even that greg is a swan, and Julius is a rhino.
invalid_hypothesis: There is almost no chance that greg is a swan, and Julius is a rhino.
hypothesis_assertion: Greg is a swan, and Julius is a rhino.