context: It is probably not the case that Mary went to the garden. It is impossible that Greg is a lion. It is certain that Brian is white. We doubt that if Brian is white, or Mary went to the garden, then Julius is a swan. It is probable that if either Mary went to the garden, or Greg is a lion, then Bernhard is gray. It is probably not the case that if either Mary went to the garden, or Greg is a lion, then Sandra took the milk.
hypothesis: We believe that either Sandra took the milk, or Bernhard is gray.
valid_hypothesis: Chances are slight that either Sandra took the milk, or Bernhard is gray.
invalid_hypothesis: We believe that either Sandra took the milk, or Bernhard is gray.
hypothesis_assertion: Either Sandra took the milk, or Bernhard is gray.