context: It is probably not the case that Greg is a lion. We doubt that Lily is a frog. It is certain that Sumit is thirsty. It is almost certain that if Lily is a frog, and Greg is a lion, then Sandra dropped the apple. It is certain that if Lily is a frog, or Greg is a lion, then Mary went to the kitchen. It is highly unlikely that if either Greg is a lion, or Lily is a frog, then John left the football.
hypothesis: It is highly unlikely that sumit is thirsty, and Mary went to the kitchen.
valid_hypothesis: Chances are about even that sumit is thirsty, and Mary went to the kitchen.
invalid_hypothesis: It is highly unlikely that sumit is thirsty, and Mary went to the kitchen.
hypothesis_assertion: Sumit is thirsty, and Mary went to the kitchen.