context: It is improbable that John went to the kitchen. It is probable that Brian is gray. It is probably the case that Sandra took the milk. It is likely that if Brian is gray, and John went to the kitchen, then Lily is a swan. It is probable that if John went to the kitchen, or Brian is gray, then Julius is a rhino. It is improbable that if Brian is gray, and Sandra took the milk, then Bernhard is green.
hypothesis: It is probably the case that either Brian is gray, or Lily is a swan.
valid_hypothesis: It is probably the case that either Brian is gray, or Lily is a swan.
invalid_hypothesis: Chances are slight that either Brian is gray, or Lily is a swan.
hypothesis_assertion: Either Brian is gray, or Lily is a swan.