context: It is probably the case that Greg is a swan. There is little chance that Jeff went to the kitchen. There is a better than even chance that John moved to the office. It is probably not the case that if Greg is a swan, or John moved to the office, then Brian is a rhino. It is improbable that if Greg is a swan, and Jeff went to the kitchen, then Bernhard is yellow. Chances are slight that if either Jeff went to the kitchen, or John moved to the office, then Mary left the apple.
hypothesis: It is probably not the case that brian is a rhino, or Mary left the apple.
valid_hypothesis: It is probably not the case that brian is a rhino, or Mary left the apple.
invalid_hypothesis: It is probable that brian is a rhino, or Mary left the apple.
hypothesis_assertion: Brian is a rhino, or Mary left the apple.