context: Chances are about even that Fred went to the kitchen. Chances are about even that John moved to the office. It is almost certain that Greg is a rhino. It is probably not the case that if Greg is a rhino, or Fred went to the kitchen, then Lily is white. It is likely that if either Greg is a rhino, or Fred went to the kitchen, then Brian is a frog. There is a better than even chance that if Greg is a rhino, or Fred went to the kitchen, then Sandra left the apple.
hypothesis: It is highly unlikely that either Lily is white, or Brian is a frog.
valid_hypothesis: Chances are about even that either Lily is white, or Brian is a frog.
invalid_hypothesis: It is highly unlikely that either Lily is white, or Brian is a frog.
hypothesis_assertion: Either Lily is white, or Brian is a frog.