context: It is highly unlikely that Brian is gray. Chances are about even that Lily is yellow. It is impossible that Jeff went to the kitchen. There is a better than even chance that if either Jeff went to the kitchen, or Brian is gray, then Julius is green. It is improbable that if Lily is yellow, and Jeff went to the kitchen, then Fred left the football. It is probably not the case that if Brian is gray, or Jeff went to the kitchen, then Bernhard is a swan.
hypothesis: It is highly unlikely that bernhard is a swan, or Julius is green.
valid_hypothesis: It is highly unlikely that bernhard is a swan, or Julius is green.
invalid_hypothesis: It is certain that bernhard is a swan, or Julius is green.
hypothesis_assertion: Bernhard is a swan, or Julius is green.