context: We believe that Julius is green. It is almost certain that Sandra took the milk. There is a very good chance that Mary went to the office. There is almost no chance that if Julius is green, and Mary went to the office, then Brian is a lion. It is impossible that if Julius is green, or Sandra took the milk, then John dropped the apple. It is highly likely that if Julius is green, or Sandra took the milk, then Bernhard is white.
hypothesis: It is highly likely that either John dropped the apple, or Bernhard is white.
valid_hypothesis: It is highly likely that either John dropped the apple, or Bernhard is white.
invalid_hypothesis: We doubt that either John dropped the apple, or Bernhard is white.
hypothesis_assertion: Either John dropped the apple, or Bernhard is white.