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The \emph{silent universe conjecture} (Sopuerta 1997, van Elst et al. 1997)states that the only algebraically general silent universes are theorthogonally spatially homogeneous Bianchi I models. In the same paper bySopuerta this was confirmed for the subcase where the spacetime also admits agroup G3 of isometries. However the proof contains a conceptual mistake. Werecover the result in a different way.Comment: 5 pages, no figure

Petrov type I silent universes with G3 isometry group: the uniqueness result recovered