context: It is likely that Greg is a frog. It is probable that John dropped the apple. Chances are about even that Bernhard is gray.
hypothesis: It is probably not the case that bernhard is gray, and Greg is a frog.
valid_hypothesis: It is probably not the case that bernhard is gray, and Greg is a frog.
invalid_hypothesis: It is certain that bernhard is gray, and Greg is a frog.
hypothesis_assertion: Bernhard is gray, and Greg is a frog.