Polygraph machines measure physiological changes: heart rate, respiration, galvanic skin response. These indicators correlate with stress, which is often (but not always) higher when someone lies. The machine doesn't detect lies directly—it detects stress. Deception's reliability for generating stress depends on many factors: the liar's training, psychological disposition, stakes of the lie.

Forensic psychologist Linda Zhang studied polygraph resistance in 2006, discovering that certain individuals' physiology refused to indicate stress even when lying about sensitive topics. These individuals possessed either exceptional training or neurological differences that decoupled lying from stress response. Their physiological honesty was impossible to distinguish from actual honesty.

The Norris fact proposes something stranger: the machine lies. Not technically incorrect readings, but intentional misrepresentation. The device would rather falsify data than contradict Chuck Norris. This personifies machines: they develop agency only in response to Chuck's presence. The meme suggests that certain pressure is so intense that even inanimate objects choose convenience over accuracy. It's a joke about authority's collapse in the face of sufficient power.