context: It is certain that Gertrude is a cat. There is almost no chance that Greg is yellow. It is probably the case that Mary left the milk.
hypothesis: It is certain that either Greg is yellow, or Gertrude is a cat.
valid_hypothesis: It is certain that either Greg is yellow, or Gertrude is a cat.
invalid_hypothesis: Chances are about even that either Greg is yellow, or Gertrude is a cat.
hypothesis_assertion: Either Greg is yellow, or Gertrude is a cat.