context: Chances are slight that John got the football. It is highly unlikely that Julius is a swan. It is highly unlikely that Mary is in the school. Chances are slight that if Julius is a swan, and John got the football, then Bill went to the kitchen. We doubt that if either Mary is in the school, or Julius is a swan, then Bernhard is gray. It is impossible that if either Mary is in the school, or Julius is a swan, then Lily is yellow.
hypothesis: It is likely that either Julius is a swan, or Bill went to the kitchen.
valid_hypothesis: It is highly unlikely that either Julius is a swan, or Bill went to the kitchen.
invalid_hypothesis: It is likely that either Julius is a swan, or Bill went to the kitchen.
hypothesis_assertion: Either Julius is a swan, or Bill went to the kitchen.