context: Chances are about even that John went to the kitchen. There is little chance that Greg is a swan. Chances are about even that Bernhard is a rhino.
hypothesis: It is highly unlikely that either Bernhard is a rhino, or John went to the kitchen.
valid_hypothesis: Chances are about even that either Bernhard is a rhino, or John went to the kitchen.
invalid_hypothesis: It is highly unlikely that either Bernhard is a rhino, or John went to the kitchen.
hypothesis_assertion: Either Bernhard is a rhino, or John went to the kitchen.