context: It is improbable that Lily is a rhino. It is probably the case that Bill put down the milk. Chances are slight that Greg is white.
hypothesis: It is certain that lily is a rhino, or Greg is white.
valid_hypothesis: We doubt that lily is a rhino, or Greg is white.
invalid_hypothesis: It is certain that lily is a rhino, or Greg is white.
hypothesis_assertion: Lily is a rhino, or Greg is white.