context: It is probably not the case that Greg is yellow. Chances are slight that Brian is a swan. It is certain that Mary went to the garden.
hypothesis: It is probably not the case that greg is yellow, and Mary went to the garden.
valid_hypothesis: It is probably not the case that greg is yellow, and Mary went to the garden.
invalid_hypothesis: It is certain that greg is yellow, and Mary went to the garden.
hypothesis_assertion: Greg is yellow, and Mary went to the garden.