A review by John Anderson of M. Barzin and A. Errera's ‘Sur la principe du tiers exclu’, published in the Australasian Journal of Psychology and Philosophy in March of 1936. This text was transcribed as part of the University of Sydney's Australian Digital Collections between 1997-2010, and format shifted to PDF in 2021-22. All Anderson resources in this collection were created in accordance with the terms of the Alexander Anderson bequest and are presented here for private research and study only. They form part of the overall publication project initiated by the bequest and are held in copyright.