context: It is impossible that Lily is a rhino. It is highly unlikely that Brian is a frog. It is highly unlikely that John went to the garden.
hypothesis: Chances are about even that either John went to the garden, or Lily is a rhino.
valid_hypothesis: It is highly unlikely that either John went to the garden, or Lily is a rhino.
invalid_hypothesis: Chances are about even that either John went to the garden, or Lily is a rhino.
hypothesis_assertion: Either John went to the garden, or Lily is a rhino.