In a letter published in Chemical & Engineering News, 28 June 2004, p.4, under the title "Nanotech challenge," Eric Drexler called for a dialog on the physical and engineering specifics of proposals to build molecular assemblers. Drexler wrote: "The recent publication of an additional letter to the editor (C&EN, May 17, page 5) regarding the Nanotechnology Point/Counterpoint (C&EN, Dec. 1, 2003, page 37) suggests that readers are still interested in this exchange. To date, although I've heard of scientists who endorse Richard E. Smalley's conclusions, none has been willing to endorse the core of his new argument (that water is essential to controlled chemical synthesis)."
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