Ha ! The look on the face of the gentleman beside him . <| sep |> Standards of rigor have changed over the centuries . A theorem proved by an Ancient Greek or a medieval mathematician according to contemporary standards of rigor may need to be clarified to meet modern standards , and upon doing so it may be discovered that the original contained unstated hypotheses , or additional axioms , or whatever . I don ' t have any particular examples of this in mind , but I think it ' s likely that some big ones must exist . It ' s also not the angle the article is going for , but still . <| sep |> Killers feel Decisive is a cheap , uncounterable way to get out of the killer ' s grasp for free . Survivors feel Unrelenting STBFL is a cheap , uncounterable way for a killer to catch and down a survivor . Basically cheap and uncounterable tactics either balance out each other or deserve one another .