context: It is certain that Lily is green. It is highly likely that Greg is a swan. Chances are slight that Mary went to the garden.
hypothesis: Chances are slight that greg is a swan, and Mary went to the garden.
valid_hypothesis: Chances are slight that greg is a swan, and Mary went to the garden.
invalid_hypothesis: We believe that greg is a swan, and Mary went to the garden.
hypothesis_assertion: Greg is a swan, and Mary went to the garden.