Hindsight · review build · data not yet validated
Autonomous nanoengineered machines (i.e., machines constructed atom by atom and molecule by molecule) have been demonstrated and include their own computational controls. However, nanoengineering is not yet considered a practical technology.
Grader A: hit
By 2009 labs had demonstrated autonomous molecular devices with built-in logic: the 2004 Benenson/Shapiro DNA automaton sensed cancer-related gene expression and released a drug molecule on its own; DNA walkers (2003) and a DNA tic-tac-toe automaton (2002) existed. Nanoengineering was not a practical technology. Atom-by-atom mechanical nanomachines (e.g. the 2005 Rice nanocar) were not autonomous, so the match is to molecular devices, not Drexler-style assemblers.
Test: Existence test (lab demonstration only, not practical): met by the 2004 autonomous DNA computer; no mainstream-share test applies.
Grader B: partial
No autonomous nanomachine with its own computational control existed by 2009; the 2005 nanocar was passive. DNA nanorobots with simple logic gating and programmed-path molecular walkers were demonstrated in 2010-2012, which fits only the 2012-2014 window at best.
Test: Capability test: demonstration only; none by 2009, early DNA-logic devices ~2010-2012.