context: There is a better than even chance that John picked up the milk. There is a very good chance that Lily is a lion. It is highly unlikely that Sandra got the football. There is almost no chance that if John picked up the milk, or Lily is a lion, then Bernhard is a frog. There is a very good chance that if John picked up the milk, or Lily is a lion, then Brian is white. It is unlikely that if John picked up the milk, or Lily is a lion, then Mary went to the kitchen.
hypothesis: There is a better than even chance that either Brian is white, or Mary went to the kitchen.
valid_hypothesis: There is a better than even chance that either Brian is white, or Mary went to the kitchen.
invalid_hypothesis: Chances are slight that either Brian is white, or Mary went to the kitchen.
hypothesis_assertion: Either Brian is white, or Mary went to the kitchen.