There's no such thing as a lie detector test. There are polygraphs, which measure blood flow, heart rate and brain activity, but they can't tell if you are lying or not with absolute certainty.
Lying requires more energy than telling the truth, it is extremely difficult if not impossible to deactivate this. In order to lie, one must have the truth ready in their mind so they can fabricate the lie, which leads to increased heart rate and brain activity.
Lying requires more energy than telling the truth, it is extremely difficult if not impossible to deactivate this. In order to lie, one must have the truth ready in their mind so they can fabricate the lie, which leads to increased heart rate and brain activity.