Assess the valence intensity of the snippet "Dr Leo Cubillan letter disputes assertion by tobacco grower Larry Walden in September 14 article that growers should not be held responsible if people smoke (S) To the Editor: Larry Walden, a tobacco grower, says: ''It never occurs to me that I'm doing anything wrong." based on the mood of the author. Offer a numerical rating between 0 and 1, with 1 representing highly positive and 0 representing highly negative.