context: It is unlikely that Mary went to the office. It is improbable that Greg is a swan. It is highly unlikely that Bernhard is white. It is unlikely that if Bernhard is white, or Greg is a swan, then Brian is a lion. It is highly likely that if Bernhard is white, or Greg is a swan, then Emily is a cat. There is little chance that if Greg is a swan, or Bernhard is white, then Sandra took the milk.
hypothesis: There is little chance that brian is a lion, or Emily is a cat.
valid_hypothesis: There is little chance that brian is a lion, or Emily is a cat.
invalid_hypothesis: It is likely that brian is a lion, or Emily is a cat.
hypothesis_assertion: Brian is a lion, or Emily is a cat.