context: Chances are slight that Bernhard is yellow. We doubt that Lily is a swan. It is highly unlikely that Fred went to the kitchen.
hypothesis: It is probably not the case that either Lily is a swan, or Fred went to the kitchen.
valid_hypothesis: It is probably not the case that either Lily is a swan, or Fred went to the kitchen.
invalid_hypothesis: It is likely that either Lily is a swan, or Fred went to the kitchen.
hypothesis_assertion: Either Lily is a swan, or Fred went to the kitchen.