context: It is certain that Mary moved to the garden. It is impossible that Greg is a rhino. It is improbable that Lily is white.
hypothesis: Chances are slight that either Lily is white, or Greg is a rhino.
valid_hypothesis: Chances are slight that either Lily is white, or Greg is a rhino.
invalid_hypothesis: It is probably the case that either Lily is white, or Greg is a rhino.
hypothesis_assertion: Either Lily is white, or Greg is a rhino.