context: It is almost certain that Sandra got the apple. It is probably the case that Brian is yellow. There is little chance that Greg is gray.
hypothesis: It is probable that either Brian is yellow, or Greg is gray.
valid_hypothesis: It is probable that either Brian is yellow, or Greg is gray.
invalid_hypothesis: We doubt that either Brian is yellow, or Greg is gray.
hypothesis_assertion: Either Brian is yellow, or Greg is gray.