context: There is a very good chance that Greg is yellow. It is almost certain that Lily is a rhino. It is probably the case that Julius is a swan.
hypothesis: There is almost no chance that either Julius is a swan, or Greg is yellow.
valid_hypothesis: Chances are about even that either Julius is a swan, or Greg is yellow.
invalid_hypothesis: There is almost no chance that either Julius is a swan, or Greg is yellow.
hypothesis_assertion: Either Julius is a swan, or Greg is yellow.