context: It is probably the case that Fred discarded the milk. It is improbable that Lily is gray. It is unlikely that Brian is a swan.
hypothesis: It is improbable that brian is a swan, and Fred discarded the milk.
valid_hypothesis: It is improbable that brian is a swan, and Fred discarded the milk.
invalid_hypothesis: It is certain that brian is a swan, and Fred discarded the milk.
hypothesis_assertion: Brian is a swan, and Fred discarded the milk.