context: We doubt that Greg is green. It is highly unlikely that John took the milk. There is a very good chance that Lily is yellow.
hypothesis: It is almost certain that either Greg is green, or John took the milk.
valid_hypothesis: It is probably not the case that either Greg is green, or John took the milk.
invalid_hypothesis: It is almost certain that either Greg is green, or John took the milk.
hypothesis_assertion: Either Greg is green, or John took the milk.