context: It is probable that Brian is a lion. We doubt that Bernhard is green. Chances are about even that Sandra got the milk. It is probable that if either Brian is a lion, or Sandra got the milk, then Lily is a frog. It is highly likely that if Bernhard is green, and Sandra got the milk, then Mary went to the office. It is unlikely that if Brian is a lion, and Sandra got the milk, then Julius is a rhino.
hypothesis: Chances are about even that either Sandra got the milk, or Bernhard is green.
valid_hypothesis: Chances are about even that either Sandra got the milk, or Bernhard is green.
invalid_hypothesis: It is certain that either Sandra got the milk, or Bernhard is green.
hypothesis_assertion: Either Sandra got the milk, or Bernhard is green.