The paper examines the impact of the idea of falsification in Karl Popper’s philosophy of science to rhetorical and political discussion. The structure of language is considered as revealing an inescapable means of falsification. After criticizing the rhetorical tradition that goes way back to Platonic and Aristotelian essentialism, the paper concludes that critical negativity committed to solving social issues should be at the core of rhetorical interaction in any democracy. Falsification and not social unanimity is what empowers democratic practices.