Gun : The Final Insult a star rating. Critics do not agree on what the cutoff is for a recommendation, even when they use the same scale. Gene Siskel and Roger Ebert "both consider[ed] a three-star rating to be the cutoff for a "thumbs up" on their scales of zero to four stars. Film critic Dave Kehr—who also uses a 0–4 star scale—believes "two stars is a borderline recommendation". On a five-star scale, regardless of the bottom rating, 3 stars is often the lowest positive rating, though judging on a purely mathematical basis, 2 1/2 stars would be the dividing line between good and bad on a 0–5 scale. Common Sense Media uses a scale of one to five, where 3 stars are "Just fine; solid" and anything lower is "Disappointing" at best. There is no agreement on what the lowest rating should be. Some critics make "one star" or a "half-star" their lowest rating. Dave Kehr believes that "one star" indicates the film has redeeming facets, and instead uses zero stars as his lowest rating. Examples of rating scales: 0–4: Roger Ebert, Gene Siskel, David Kehr and Peter Travers 0.5–4: Steven H. Scheuer's now-defunct film guide grades films from a half-star ("abysmal") to four stars ("excellent"). Despite this, Scheuer's guide intentionally gives Wes Craven's film The Last House on the Left no stars, making it the lowest-rated film in the book. 0–5: The Times 1–4: Film critic Leonard Maltin rates films on a scale of one through four stars, although his guide notes that there is no actual "one star" rating. For these "bottom-of-the-barrel movies", Maltin's guide uses the citation "BOMB". However, according to Maltin, the 1981 Bo Derek film Tarzan, the Ape Man "nearly forced the editors of this book to devise a rating lower than BOMB". 1–5: Common Sense Media, Empire Critics have different ways of denoting the lowest rating when this is a "zero". Some such as Peter Travers display empty stars. Jonathan Rosenbaum and Dave Kehr use a round black dot. Leslie Halliwell uses a blank space. The Globe and Mail uses a "0", or as their former film critic dubbed it, the "death doughnut". Roger Ebert used a thumbs-down symbol. Other critics use a black dot. Critics also do not agree on what the lower ratings signify, let alone the lowest rating. While Maltin's and Scheuer's guides respectively explain that lowest rated films are