context: There is almost no chance that John went to the garden. It is probably not the case that Brian is gray. It is unlikely that Greg is green.
hypothesis: It is highly unlikely that greg is green, and Brian is gray.
valid_hypothesis: It is highly unlikely that greg is green, and Brian is gray.
invalid_hypothesis: Chances are about even that greg is green, and Brian is gray.
hypothesis_assertion: Greg is green, and Brian is gray.