context: It is probably the case that Greg is yellow. We believe that Brian is gray. It is certain that Winona is a sheep.
hypothesis: It is likely that winona is a sheep, and Greg is yellow.
valid_hypothesis: It is likely that winona is a sheep, and Greg is yellow.
invalid_hypothesis: Chances are slight that winona is a sheep, and Greg is yellow.
hypothesis_assertion: Winona is a sheep, and Greg is yellow.