context: We doubt that Lily is a swan. It is highly likely that Mary dropped the milk. It is probable that Greg is a lion.
hypothesis: It is almost certain that greg is a lion, or Mary dropped the milk.
valid_hypothesis: It is almost certain that greg is a lion, or Mary dropped the milk.
invalid_hypothesis: There is little chance that greg is a lion, or Mary dropped the milk.
hypothesis_assertion: Greg is a lion, or Mary dropped the milk.