context: It is likely that Mary dropped the milk. There is almost no chance that Brian is a swan. It is certain that John went to the kitchen. It is highly likely that if John went to the kitchen, or Mary dropped the milk, then Lily is yellow. There is little chance that if Brian is a swan, or John went to the kitchen, then Gertrude is a mouse. There is almost no chance that if either Mary dropped the milk, or Brian is a swan, then Julius is white.
hypothesis: There is little chance that either John went to the kitchen, or Julius is white.
valid_hypothesis: It is certain that either John went to the kitchen, or Julius is white.
invalid_hypothesis: There is little chance that either John went to the kitchen, or Julius is white.
hypothesis_assertion: Either John went to the kitchen, or Julius is white.