context: We believe that Brian is yellow. It is almost certain that Mary went to the kitchen. It is almost certain that Julius is white. It is certain that if Julius is white, and Brian is yellow, then Lily is a lion. It is almost certain that if either Mary went to the kitchen, or Brian is yellow, then Greg is a swan. Chances are about even that if Mary went to the kitchen, and Brian is yellow, then Sandra left the milk.
hypothesis: It is impossible that brian is yellow, or Lily is a lion.
valid_hypothesis: We believe that brian is yellow, or Lily is a lion.
invalid_hypothesis: It is impossible that brian is yellow, or Lily is a lion.
hypothesis_assertion: Brian is yellow, or Lily is a lion.