context: Chances are about even that Mary picked up the apple. It is unlikely that Jeff went to the kitchen. It is almost certain that Greg is a lion. It is likely that if either Mary picked up the apple, or Jeff went to the kitchen, then Lily is a lion. It is likely that if either Greg is a lion, or Mary picked up the apple, then John took the football. There is little chance that if Mary picked up the apple, or Greg is a lion, then Bernhard is yellow.
hypothesis: Chances are slight that jeff went to the kitchen, or Mary picked up the apple.
valid_hypothesis: There is a better than even chance that jeff went to the kitchen, or Mary picked up the apple.
invalid_hypothesis: Chances are slight that jeff went to the kitchen, or Mary picked up the apple.
hypothesis_assertion: Jeff went to the kitchen, or Mary picked up the apple.