# Inside the Pentagon's polygraph hunt for leakers > A 27-year CIA veteran explains why the machine chasing Pentagon leakers is closer to stagecraft than science. - Title: Inside the Pentagon's polygraph hunt for leakers | Shortify - Summary: A 27-year CIA veteran explains why the machine chasing Pentagon leakers is closer to stagecraft than science. The polygraph does not detect lies. It detects… - Keywords: polygraph, national security, pentagon, press leaks, lie detection, science, ideas, Inside, Pentagon's, hunt, leakers, The Conversation - Source: The Conversation — https://theconversation.com/the-pentagon-is-using-polygraphs-to-hunt-leakers-but-the-tests-are-more-theater-than-fact-291622 - Author: Brian O'Neill - Read time: 2 min - Topics: polygraph, national security, pentagon, press leaks, lie detection, science, ideas ## Fifty officers, one machine In August 2026, investigators polygraphed about 50 Joint Staff officers and civilian staff over press leaks about the Iran war and depleted U.S. munitions. The Times called the scope unprecedented in the modern military. ## Not a first attempt The Trump administration ordered a wave of tests across the executive branch in 2025 to expose leaks that were, by any measure, minor. ## A dozen tests, one rule The author sat for roughly a dozen polygraphs over 27 years at the CIA. His advice to anyone facing one has never changed: don't lie. > My advice is always the same: Don't lie. ## Built by television Crime dramas sold the polygraph as an oracle that cracks a case when everything else fails. The nickname "lie detector" does the rest of the work. > In those portrayals, the polygraph is not merely a tool, it's a window into the soul. ## What it actually measures Heart rate, blood pressure, sweat. The machine assumes liars spike, but a person can tremble from fear, anger or plain frustration and register exactly the same way. ## The science says no There is no physiological signature unique to lying. The National Academy of Sciences in 2003, the American Psychological Association in 2004 and a 2019 review all landed in the same place. > the polygraph rests more on theater than fact ## Courts mostly refuse it Polygraph results are generally inadmissible in U.S. courts. Georgia, Arizona and California allow narrow exceptions, usually needing both parties to agree and a judge to sign off. ## Still a hiring gate Inside national security agencies the test filters candidates anyway. An examiner's hunch that an answer felt evasive has stalled clearances over drug-use or foreign-contact questions with nothing disqualifying ever documented. ## Confession is the product Told a chart looks odd, strong applicants start volunteering things they never planned to share: old infractions, undeclared relationships, decades-old drug use. None disqualifying, all reputation-shaping. > The polygraph's power lies in creating the conditions under which deception is confessed. ## Which leaks get chased Disclosures that flatter the official line get quietly tolerated. Ones that embarrass senior officials get investigated, from Valerie Plame's outing in 2003 to Chelsea Manning's cables in 2010. > Government reaction often depends less on what was disclosed than on who disclosed it. ## The cost of the hunt The campaign will not stop leaks. It will chill internal candor, drain morale and pull investigators off real security work. AI lie detection is nowhere near ready to replace any of it. > imperfect, imprecise and more performative than predictive ## Key takeaway The polygraph does not detect lies. It detects nerves, and its real power is scaring people into confessing.