 Informational idealization ranges between complete information and adequate or relevant information. The motivations for embracing and rejecting full information resemble those for full rationality. A full information account is attractive because it attributes reasons to citizens based on many true propositions and no false ones. Further, complete information might guarantee determinate recommendations, and if agents share relevant information, they will tend to converge on similar conclusions. Yet, complete information may model citizens in an implausibly abstract fashion, and it gives them powers that no finite and fallible being has.