context: Chances are about even that Mary went to the bedroom. It is almost certain that Bernhard is a swan. We believe that Greg is a frog.
hypothesis: It is probably the case that bernhard is a swan, and Greg is a frog.
valid_hypothesis: It is probably the case that bernhard is a swan, and Greg is a frog.
invalid_hypothesis: Chances are slight that bernhard is a swan, and Greg is a frog.
hypothesis_assertion: Bernhard is a swan, and Greg is a frog.