context: It is probably the case that Brian is a frog. There is a very good chance that Fred moved to the cinema. It is likely that Julius is a rhino.
hypothesis: It is certain that either Brian is a frog, or Julius is a rhino.
valid_hypothesis: Chances are about even that either Brian is a frog, or Julius is a rhino.
invalid_hypothesis: It is certain that either Brian is a frog, or Julius is a rhino.
hypothesis_assertion: Either Brian is a frog, or Julius is a rhino.