context: There is almost no chance that Sandra is in the hallway. It is probably the case that Greg is gray. Chances are about even that Mary got the apple.
hypothesis: It is impossible that mary got the apple, or Greg is gray.
valid_hypothesis: There is a very good chance that mary got the apple, or Greg is gray.
invalid_hypothesis: It is impossible that mary got the apple, or Greg is gray.
hypothesis_assertion: Mary got the apple, or Greg is gray.