context: Chances are about even that Greg is yellow. There is a very good chance that John got the apple. It is probable that Sandra grabbed the milk. There is almost no chance that if either John got the apple, or Greg is yellow, then Bill is in the school. Chances are slight that if John got the apple, or Sandra grabbed the milk, then Brian is green. Chances are slight that if either John got the apple, or Sandra grabbed the milk, then Emily is a mouse.
hypothesis: It is almost certain that brian is green, and John got the apple.
valid_hypothesis: There is little chance that brian is green, and John got the apple.
invalid_hypothesis: It is almost certain that brian is green, and John got the apple.
hypothesis_assertion: Brian is green, and John got the apple.