Effective lie detection is less about spotting non-verbal tics and more about strategic questioning. Asking open-ended and unanticipated questions dramatically increases a liar's cognitive load, making deception harder to maintain and revealing the true cues of falsehood.

Despite its prevalence in fiction, blackmail is a poor strategy for recruiting intelligence assets. It creates an unreliable and resentful source who is always seeking an escape. Successful, long-term espionage relationships must be built on a positive foundation of trust, not coercion.

Employing torture against high-value suspects destroys the state's ability to achieve legal justice. When military commissions and courts inevitably throw out coerced confessions due to unlawful interrogation techniques, formal prosecutions stall indefinitely. Victims' families are denied closure and detainees remain in indefinite legal limbo because tainted evidence cannot be introduced in judicial proceedings.

Showing mercy to disabled enemy combatants is tactically superior for three reasons: it encourages adversaries to surrender rather than fight to the death; it yields valuable intelligence from prisoners; and it establishes a standard of conduct that protects one's own captured soldiers from reciprocal brutality.

The most consistent indicator of lying is providing sparse information, not excessive detail, due to the high cognitive load of inventing a story. Asking "tell me more" is an effective way to expose this, as truth-tellers can elaborate easily while liars struggle.

Dick Cheney justified harsh interrogation techniques not by downplaying them, but by reframing the debate as a stark moral choice. He posed a question: 'Are you going to ransom lives for your honor? Or are you going to do your job?' This rhetoric positioned torture as a necessary, albeit unpleasant, duty to prevent future attacks, rather than a legal or ethical violation.

Rapport-building techniques yield far superior intelligence compared to violent interrogation. The FBI's approach focuses on treating detainees with patience, decency, and small gestures of respect, gradually establishing genuine communication over weeks or months. By contrast, harsh treatment produces hostility and fabricated narratives, whereas humane engagement reliably yields truthful details.

Instead of interpreting unreliable nonverbal cues, a more accurate lie detection method is to focus on the content. Simply asking yourself "how verifiable is this statement?" is a superior strategy, as liars provide fewer details that can be independently checked.

Asking, "Is there any reason [evidence] of you might exist?" creates a powerful dilemma for a guilty person. They must either lie and risk being proven a liar, or place themselves at the scene of the crime. An innocent person, by contrast, will answer quickly and without hesitation.