Kant on free choice

    Consider from the documentary what Clotaire Rapaille says about the effects of advertising on the reptilian brain and the implications of predictive data collection by companies like the Acxiom Corporation.   If (as Kant tells us ) a free choice is a choice made without any influence from anything except our own will deciding to take this or that direction than do any of us ever make a completely free choice? In today's world so dominated by powerful influences like the advertising industry, how can we be absolutely certain that any choice we have made has been an entirely free one?