context: It is probably not the case that John put down the milk. It is unlikely that Julius is a rhino. It is almost certain that Fred moved to the office. There is a better than even chance that if Julius is a rhino, or Fred moved to the office, then Greg is a frog. Chances are about even that if either Julius is a rhino, or John put down the milk, then Brian is a swan. It is almost certain that if either John put down the milk, or Julius is a rhino, then Lily is yellow.
hypothesis: Chances are about even that either Greg is a frog, or Brian is a swan.
valid_hypothesis: Chances are about even that either Greg is a frog, or Brian is a swan.
invalid_hypothesis: It is impossible that either Greg is a frog, or Brian is a swan.
hypothesis_assertion: Either Greg is a frog, or Brian is a swan.