context: It is certain that Julius is gray. It is impossible that Mary went to the garden. There is a better than even chance that Gertrude is a mouse.
hypothesis: It is certain that either Mary went to the garden, or Julius is gray.
valid_hypothesis: It is certain that either Mary went to the garden, or Julius is gray.
invalid_hypothesis: Chances are slight that either Mary went to the garden, or Julius is gray.
hypothesis_assertion: Either Mary went to the garden, or Julius is gray.