Before revision: The paper addresses the question of how to test the validity of candidate systems for general odor reproduction .
After revision: In 1950 Alan Turing proposed his imitation game, better known as the Turing test, for determining whether a computer system claimed to adequately exhibit intelligence indeed does so. This work was carried out although no such system was anywhere in sight at the time, and we are still far from it now, many decades later. The current paper raises the similarly tantalizing question of how to test the validity of candidate systems for general odor reproduction .