context: It is impossible that Greg is a lion. It is likely that Lily is a rhino. It is almost certain that Bernhard is a swan.
hypothesis: It is almost certain that either Bernhard is a swan, or Greg is a lion.
valid_hypothesis: It is almost certain that either Bernhard is a swan, or Greg is a lion.
invalid_hypothesis: There is little chance that either Bernhard is a swan, or Greg is a lion.
hypothesis_assertion: Either Bernhard is a swan, or Greg is a lion.