context: It is probably the case that Brian is a frog. It is unlikely that Mary got the milk. It is probable that John went to the hallway. It is probably the case that if Mary got the milk, or Brian is a frog, then Julius is green. Chances are about even that if John went to the hallway, and Mary got the milk, then Fred is in the kitchen. Chances are slight that if Brian is a frog, or Mary got the milk, then Lily is a swan.
hypothesis: It is highly likely that mary got the milk, or Lily is a swan.
valid_hypothesis: It is probably not the case that mary got the milk, or Lily is a swan.
invalid_hypothesis: It is highly likely that mary got the milk, or Lily is a swan.
hypothesis_assertion: Mary got the milk, or Lily is a swan.