context: It is probable that Brian is gray. It is probable that John got the milk. It is likely that Jeff put down the apple.
hypothesis: Chances are about even that jeff put down the apple, and John got the milk.
valid_hypothesis: Chances are about even that jeff put down the apple, and John got the milk.
invalid_hypothesis: It is certain that jeff put down the apple, and John got the milk.
hypothesis_assertion: Jeff put down the apple, and John got the milk.