context: It is probably the case that Brian is gray. It is probable that Fred left the football. It is highly likely that Lily is a rhino.
hypothesis: Chances are about even that fred left the football, and Brian is gray.
valid_hypothesis: Chances are about even that fred left the football, and Brian is gray.
invalid_hypothesis: It is almost certain that fred left the football, and Brian is gray.
hypothesis_assertion: Fred left the football, and Brian is gray.