Today’s federal effort to develop an efficient machine for credibility assessment has been compared to the Manhattan Project, the secret government undertaking to build the atomic bomb. This sounds hyperbolic, to compare a high-tech lie detector to a weapon of mass destruction, but Tom Zeffiro, who made the analogy, said that they raise similar moral quandaries, especially for the scientists doing the research. If a truly efficient lie detector could be developed, he said, we might find ourselves living in “a fundamentally different world than the one we live in today.”