context: We doubt that John moved to the garden. We believe that Brian is a rhino. It is likely that Mary dropped the apple. There is little chance that if either Mary dropped the apple, or John moved to the garden, then Julius is yellow. It is unlikely that if Mary dropped the apple, or John moved to the garden, then Bernhard is a frog. It is highly unlikely that if John moved to the garden, and Brian is a rhino, then Greg is a swan.
hypothesis: Chances are about even that either Mary dropped the apple, or Brian is a rhino.
valid_hypothesis: Chances are about even that either Mary dropped the apple, or Brian is a rhino.
invalid_hypothesis: It is highly unlikely that either Mary dropped the apple, or Brian is a rhino.
hypothesis_assertion: Either Mary dropped the apple, or Brian is a rhino.