context: There is a better than even chance that Sandra left the milk. It is almost certain that Lily is a swan. It is probably not the case that Greg is a frog. It is likely that if Sandra left the milk, or Greg is a frog, then Jason is bored. It is probable that if either Greg is a frog, or Lily is a swan, then Mary went to the park. It is probably the case that if Lily is a swan, and Greg is a frog, then Brian is a lion.
hypothesis: It is improbable that brian is a lion, or Mary went to the park.
valid_hypothesis: It is probable that brian is a lion, or Mary went to the park.
invalid_hypothesis: It is improbable that brian is a lion, or Mary went to the park.
hypothesis_assertion: Brian is a lion, or Mary went to the park.