You don’t. You can take it on faith if you trust the speaker or you can seek independant verification of the facts, if possible. Lie detectors, ways to evaluate people’s posture, eye movement, etc have been used, but are imperfect.
Answering questions at Boston College O’Neill Library
You don’t. You can take it on faith if you trust the speaker or you can seek independant verification of the facts, if possible. Lie detectors, ways to evaluate people’s posture, eye movement, etc have been used, but are imperfect.