context: Chances are slight that Greg is a swan. It is almost certain that Mary went to the garden. It is highly unlikely that Lily is gray.
hypothesis: Chances are about even that mary went to the garden, or Greg is a swan.
valid_hypothesis: It is almost certain that mary went to the garden, or Greg is a swan.
invalid_hypothesis: Chances are about even that mary went to the garden, or Greg is a swan.
hypothesis_assertion: Mary went to the garden, or Greg is a swan.