A person can prepare for the examination, but deceiving it is impossible! In any case, it is important to notify the person in advance about the polygraph examination. Preparing for the test is impossible! On the internet, you can find various ways to “cheat” a lie detector, but in practice, they only assist an experienced polygraph examiner. Before the test, a person may use various countermeasures, but all of them are known to experienced polygraph examiners and are encountered in everyday practice. The polygraph is a complex and sensitive device that records up to nine modifiable reflex psychophysiological parameters, ensuring high accuracy of results. Errors in the lie detector are not device errors but errors of the polygraph examiner. Insufficient qualification can lead to incorrect results. An experienced specialist will not succumb to drug blockers, “folk remedies,” or even specially trained individuals. We are aware of all methods of resisting polygraph tests, but resistance will be detected. Please do not complicate your life; such attempts will be identified, and then justifications will need to be sought.