context: Chances are slight that Bill is in the kitchen. It is certain that Julius is gray. It is probably not the case that Lily is a swan. Chances are slight that if Bill is in the kitchen, or Lily is a swan, then Sandra took the football. It is improbable that if either Julius is gray, or Bill is in the kitchen, then John went to the garden. It is probable that if either Bill is in the kitchen, or Julius is gray, then Bernhard is a lion.
hypothesis: Chances are about even that bill is in the kitchen, or Julius is gray.
valid_hypothesis: It is certain that bill is in the kitchen, or Julius is gray.
invalid_hypothesis: Chances are about even that bill is in the kitchen, or Julius is gray.
hypothesis_assertion: Bill is in the kitchen, or Julius is gray.