context: It is probable that Brian is a frog. It is likely that Bernhard is a rhino. It is likely that Bill went to the garden.
hypothesis: There is almost no chance that either Bill went to the garden, or Bernhard is a rhino.
valid_hypothesis: Chances are about even that either Bill went to the garden, or Bernhard is a rhino.
invalid_hypothesis: There is almost no chance that either Bill went to the garden, or Bernhard is a rhino.
hypothesis_assertion: Either Bill went to the garden, or Bernhard is a rhino.