context: It is unlikely that Lily is gray. It is unlikely that Julius is green. Chances are about even that Greg is a swan.
hypothesis: There is a better than even chance that greg is a swan, or Julius is green.
valid_hypothesis: There is a better than even chance that greg is a swan, or Julius is green.
invalid_hypothesis: There is almost no chance that greg is a swan, or Julius is green.
hypothesis_assertion: Greg is a swan, or Julius is green.