context: It is highly unlikely that Julius is a swan. It is probably the case that Mary left the football. It is impossible that Gertrude is a mouse.
hypothesis: We doubt that either Gertrude is a mouse, or Mary left the football.
valid_hypothesis: It is probably the case that either Gertrude is a mouse, or Mary left the football.
invalid_hypothesis: We doubt that either Gertrude is a mouse, or Mary left the football.
hypothesis_assertion: Either Gertrude is a mouse, or Mary left the football.