A short reply to Winterberg's article can be found at [3] Archived 2006-08-06 at the Wayback Machine ; the original long reply can be accessed via the Internet Archive at [4]. In this reply, Winterberg's hypothesis is called " paranoid " and "speculative". Cory et al. offer the following alternative speculation: "it is possible that Hilbert himself cropped off the top of p. 7 to include it with the three sheets he sent Klein, in order that they not end in mid-sentence."