context: It is unlikely that Julius is a swan. Chances are slight that Sandra grabbed the milk. It is improbable that Brian is a lion. It is likely that if Julius is a swan, or Sandra grabbed the milk, then Lily is a rhino. It is almost certain that if either Brian is a lion, or Julius is a swan, then John went to the kitchen. Chances are slight that if Julius is a swan, and Sandra grabbed the milk, then Greg is gray.
hypothesis: It is probably not the case that greg is gray, or John went to the kitchen.
valid_hypothesis: It is probably not the case that greg is gray, or John went to the kitchen.
invalid_hypothesis: There is a very good chance that greg is gray, or John went to the kitchen.
hypothesis_assertion: Greg is gray, or John went to the kitchen.