context: We doubt that Brian is a rhino. We believe that Sandra got the apple. It is probable that Julius is a frog.
hypothesis: It is impossible that either Julius is a frog, or Sandra got the apple.
valid_hypothesis: Chances are about even that either Julius is a frog, or Sandra got the apple.
invalid_hypothesis: It is impossible that either Julius is a frog, or Sandra got the apple.
hypothesis_assertion: Either Julius is a frog, or Sandra got the apple.