context: There is little chance that Greg is a rhino. It is probably not the case that Jeff put down the apple. Chances are about even that Bernhard is a swan.
hypothesis: It is impossible that either Greg is a rhino, or Bernhard is a swan.
valid_hypothesis: Chances are about even that either Greg is a rhino, or Bernhard is a swan.
invalid_hypothesis: It is impossible that either Greg is a rhino, or Bernhard is a swan.
hypothesis_assertion: Either Greg is a rhino, or Bernhard is a swan.