context: It is almost certain that Bernhard is green. We believe that Greg is a lion. Chances are slight that Brian is a swan.
hypothesis: There is little chance that brian is a swan, and Bernhard is green.
valid_hypothesis: There is little chance that brian is a swan, and Bernhard is green.
invalid_hypothesis: It is probably the case that brian is a swan, and Bernhard is green.
hypothesis_assertion: Brian is a swan, and Bernhard is green.