context: It is impossible that Lily is green. It is probably not the case that Brian is a frog. We doubt that Greg is a rhino.
hypothesis: Chances are about even that greg is a rhino, and Brian is a frog.
valid_hypothesis: It is highly unlikely that greg is a rhino, and Brian is a frog.
invalid_hypothesis: Chances are about even that greg is a rhino, and Brian is a frog.
hypothesis_assertion: Greg is a rhino, and Brian is a frog.