context: Chances are about even that John picked up the apple. There is little chance that Mary got the milk. Chances are about even that Greg is yellow. It is unlikely that if either John picked up the apple, or Greg is yellow, then Julius is a swan. It is likely that if Mary got the milk, or Greg is yellow, then Jason is hungry. It is likely that if John picked up the apple, and Mary got the milk, then Brian is a rhino.
hypothesis: Chances are about even that either Julius is a swan, or Jason is hungry.
valid_hypothesis: Chances are about even that either Julius is a swan, or Jason is hungry.
invalid_hypothesis: It is almost certain that either Julius is a swan, or Jason is hungry.
hypothesis_assertion: Either Julius is a swan, or Jason is hungry.