During the election campaign and, if elected, at random intervals thenceforth, each candidate is strapped into a harness and lowered into a giant test-tube full of a combination of drug test solutions, for a period of several days.-- FlyingToaster, Nov 04 2013 MRI lie detectors are supposedly infallible http://www.noliemri.com/ [theircompetitor, Nov 05 2013] it's funny that this always comes up. But do we really want politicians that always tell the truth? Liar, Liar comes to mind :)-- theircompetitor, Nov 04 2013 What I want is not a politician who tells the truth so much as one who will listen to it.-- Alterother, Nov 04 2013 No there has to be a simple machine that indicates the truth is either 1) out there 2)in here. Objects placed in the device including politicians get one out of the two indicator lights.-- rcarty, Nov 05 2013 There is. Might be fun to imagine a congressional session like this. Or the President doing the State of the Union from one of these-- theircompetitor, Nov 05 2013 Better to alternately immerse them in vats of concentrated acid and concentrated alkali, and see if they change colour.-- 8th of 7, Nov 05 2013 random, halfbakery