context: There is almost no chance that Gertrude is a mouse. We believe that Brian is a swan. It is improbable that Bernhard is a rhino.
hypothesis: There is almost no chance that gertrude is a mouse, and Brian is a swan.
valid_hypothesis: There is almost no chance that gertrude is a mouse, and Brian is a swan.
invalid_hypothesis: We believe that gertrude is a mouse, and Brian is a swan.
hypothesis_assertion: Gertrude is a mouse, and Brian is a swan.