context: Chances are slight that Mary left the milk. It is likely that Gertrude is a sheep. There is a better than even chance that Brian is a rhino.
hypothesis: We doubt that either Gertrude is a sheep, or Mary left the milk.
valid_hypothesis: It is probable that either Gertrude is a sheep, or Mary left the milk.
invalid_hypothesis: We doubt that either Gertrude is a sheep, or Mary left the milk.
hypothesis_assertion: Either Gertrude is a sheep, or Mary left the milk.