Poincaré on Non-Euclidean Geometry
Henri Poincaré published La science et l'hypothèse in Paris in 1902. An English translation entitled Science and hypothesis was published in 1905. It contains a number of articles written by Poincaré over quite a number of years and we present below a version of one of these articles, namely the one on Non-Euclidean geometries Every conclusion presumes premisses.