context: It is probably not the case that Greg is green. It is certain that Lily is white. It is unlikely that Fred dropped the apple. There is almost no chance that if either Fred dropped the apple, or Lily is white, then Brian is a swan. It is impossible that if Lily is white, or Greg is green, then Sandra left the milk. It is impossible that if Greg is green, or Lily is white, then Mary went to the kitchen.
hypothesis: It is impossible that sandra left the milk, and Greg is green.
valid_hypothesis: It is impossible that sandra left the milk, and Greg is green.
invalid_hypothesis: It is highly likely that sandra left the milk, and Greg is green.
hypothesis_assertion: Sandra left the milk, and Greg is green.