context: We believe that Lily is green. It is probably not the case that John dropped the apple. There is little chance that Brian is gray.
hypothesis: We believe that brian is gray, and Lily is green.
valid_hypothesis: There is little chance that brian is gray, and Lily is green.
invalid_hypothesis: We believe that brian is gray, and Lily is green.
hypothesis_assertion: Brian is gray, and Lily is green.