context: It is highly unlikely that Julius is a rhino. It is impossible that Bernhard is yellow. It is improbable that Brian is gray.
hypothesis: There is little chance that brian is gray, or Bernhard is yellow.
valid_hypothesis: There is little chance that brian is gray, or Bernhard is yellow.
invalid_hypothesis: It is certain that brian is gray, or Bernhard is yellow.
hypothesis_assertion: Brian is gray, or Bernhard is yellow.