context: It is impossible that Bernhard is a frog. It is impossible that Brian is a rhino. It is improbable that Sumit is hungry.
hypothesis: It is impossible that either Brian is a rhino, or Bernhard is a frog.
valid_hypothesis: It is impossible that either Brian is a rhino, or Bernhard is a frog.
invalid_hypothesis: It is probably the case that either Brian is a rhino, or Bernhard is a frog.
hypothesis_assertion: Either Brian is a rhino, or Bernhard is a frog.