context: There is little chance that Brian is a lion. There is almost no chance that Greg is green. It is highly likely that Lily is a rhino.
hypothesis: It is impossible that greg is green, and Brian is a lion.
valid_hypothesis: It is impossible that greg is green, and Brian is a lion.
invalid_hypothesis: There is a very good chance that greg is green, and Brian is a lion.
hypothesis_assertion: Greg is green, and Brian is a lion.