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We develop a theory of social polarization induced by "deliberation as self-discovery." In such deliberation, intrinsically persuasive arguments activate the "latent" reasons of the corresponding listeners, whose beliefs about the best alternative change only in response to arguments they find persuasive. In equilibrium, agents sort into ideologically biased groups with speakers whose ideological bias reinforces their own. These choices, in turn, give rise to group polarization -a widely citeddoi:10.2139/ssrn.887634 fatcat:dcesvca7fvc5hlsspkwppbicve