context: There is little chance that John moved to the garden. There is a very good chance that Greg is a rhino. It is probably the case that Mary put down the apple.
hypothesis: It is impossible that either Greg is a rhino, or Mary put down the apple.
valid_hypothesis: Chances are about even that either Greg is a rhino, or Mary put down the apple.
invalid_hypothesis: It is impossible that either Greg is a rhino, or Mary put down the apple.
hypothesis_assertion: Either Greg is a rhino, or Mary put down the apple.