context: It is probable that Daniel got the apple. We doubt that Lily is green. It is certain that John went to the kitchen. Chances are about even that if Lily is green, and John went to the kitchen, then Julius is green. It is impossible that if Daniel got the apple, and John went to the kitchen, then Greg is a swan. There is little chance that if John went to the kitchen, or Lily is green, then Gertrude is a wolf.
hypothesis: It is impossible that greg is a swan, and Daniel got the apple.
valid_hypothesis: It is impossible that greg is a swan, and Daniel got the apple.
invalid_hypothesis: It is certain that greg is a swan, and Daniel got the apple.
hypothesis_assertion: Greg is a swan, and Daniel got the apple.