context: It is almost certain that Bernhard is a rhino. It is highly unlikely that Julius is a lion. It is probably the case that Greg is a swan.
hypothesis: It is certain that greg is a swan, or Bernhard is a rhino.
valid_hypothesis: It is certain that greg is a swan, or Bernhard is a rhino.
invalid_hypothesis: It is impossible that greg is a swan, or Bernhard is a rhino.
hypothesis_assertion: Greg is a swan, or Bernhard is a rhino.