context: It is almost certain that Lily is yellow. There is little chance that Julius is a swan. It is probable that John went to the bedroom. There is little chance that if Julius is a swan, and Lily is yellow, then Fred left the football. There is almost no chance that if either Julius is a swan, or John went to the bedroom, then Mary dropped the milk. There is a better than even chance that if Julius is a swan, or John went to the bedroom, then Greg is gray.
hypothesis: There is almost no chance that either Greg is gray, or Julius is a swan.
valid_hypothesis: Chances are about even that either Greg is gray, or Julius is a swan.
invalid_hypothesis: There is almost no chance that either Greg is gray, or Julius is a swan.
hypothesis_assertion: Either Greg is gray, or Julius is a swan.