Vance,
What you say is somewhat true in criminal cases. But we are talking about employee screening here. The court admissibilty of a polygraph is moot. People are losing their jobs and security clearances soley on the basis of those "squiggly lines". More important though is the possibility that the DOE may be relying on the polygraph so much that the real spies (who know how to manipulate the test) are slipping through unnoticed.