context: We doubt that Greg is a frog. We believe that Julius is green. It is probably the case that Bernhard is a swan.
hypothesis: It is impossible that either Greg is a frog, or Bernhard is a swan.
valid_hypothesis: There is a better than even chance that either Greg is a frog, or Bernhard is a swan.
invalid_hypothesis: It is impossible that either Greg is a frog, or Bernhard is a swan.
hypothesis_assertion: Either Greg is a frog, or Bernhard is a swan.