context: It is probably the case that Bill went to the kitchen. It is likely that Greg is a rhino. It is highly unlikely that Mary picked up the apple.
hypothesis: It is almost certain that either Greg is a rhino, or Bill went to the kitchen.
valid_hypothesis: Chances are about even that either Greg is a rhino, or Bill went to the kitchen.
invalid_hypothesis: It is almost certain that either Greg is a rhino, or Bill went to the kitchen.
hypothesis_assertion: Either Greg is a rhino, or Bill went to the kitchen.