context: It is probably not the case that Bernhard is yellow. It is almost certain that Lily is green. Chances are about even that Sandra dropped the milk. It is improbable that if either Sandra dropped the milk, or Bernhard is yellow, then Brian is a frog. It is almost certain that if Bernhard is yellow, and Lily is green, then Greg is a lion. There is a better than even chance that if either Lily is green, or Sandra dropped the milk, then Mary went to the office.
hypothesis: It is almost certain that either Greg is a lion, or Sandra dropped the milk.
valid_hypothesis: Chances are about even that either Greg is a lion, or Sandra dropped the milk.
invalid_hypothesis: It is almost certain that either Greg is a lion, or Sandra dropped the milk.
hypothesis_assertion: Either Greg is a lion, or Sandra dropped the milk.