context: We believe that Lily is green. There is almost no chance that Bernhard is yellow. There is a very good chance that John left the milk. It is likely that if John left the milk, and Lily is green, then Brian is gray. We believe that if either Lily is green, or John left the milk, then Greg is a swan. Chances are slight that if either Bernhard is yellow, or John left the milk, then Bill went to the cinema.
hypothesis: It is impossible that brian is gray, and Lily is green.
valid_hypothesis: Chances are about even that brian is gray, and Lily is green.
invalid_hypothesis: It is impossible that brian is gray, and Lily is green.
hypothesis_assertion: Brian is gray, and Lily is green.