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Judging by Cicero 's account in De Finibus 2.2 , an attitude of opposition played an integral role in lessons in the skeptical Academy , where Arcesilaus , at any rate , proceeded by opposing some thesis enunciated by a student ( e.g ., “ The Chief Good in my opinion is pleasure ” ) . State and federal wildlife agencies have for some sixty years functioned under the belief that increased knowledge produced by research improves our ability to manage wildlife . The balance of trade has become a very emotional issue ; some claim our trade deficit has cost us millions of jobs . Eventually this demonstration was dispersed by the police , using tear gas bombs and then a baton charge , some sixty police following them into the side streets . Although the precise lighting levels are not critical , in many situations it will be helpful to allow DSE users to have some control over the lighting of their workstation .