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Either industrial pollutants will be more stringently controlled, or air quality will continue to fall. Industrial pollutants will be more stringently controlled. Therefore, air quality will not continue to fall. (I, A)

Translate the following arguments into symbolic notation and then interpret them in light of the eight argument forms presented in this section. In some cases a symbolized argument must be rewritten using commutativity or double negation before it becomes an instance of one of these forms. Those not having a named form are invalid. The letters to be used in translating the statements are given in parentheses.