context: We doubt that Julius is yellow. There is little chance that Greg is a swan. There is little chance that John left the milk.
hypothesis: It is unlikely that greg is a swan, or John left the milk.
valid_hypothesis: It is unlikely that greg is a swan, or John left the milk.
invalid_hypothesis: It is certain that greg is a swan, or John left the milk.
hypothesis_assertion: Greg is a swan, or John left the milk.