To get past surface-level answers and understand someone's true motivations, ask them to go deeper than their initial statement. Then ask again, and a third time. This simple technique pushes past rehearsed responses, and the third answer is typically the one closest to the real truth.

Most people rarely lie and therefore operate with a "truth bias," assuming others are also being truthful. This cognitive default, while efficient for most interactions, becomes a major vulnerability that people with dark personality traits exploit. They can lie frequently because it rarely occurs to others to question them.

When assessing a person's character and predicting their future actions, disregard their words and focus solely on their historical patterns of behavior. Like an FBI profiler, understand that while people may lie, their patterns reveal the truth.

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.

There is no single giveaway for lying that applies to everyone. The key is to first understand an individual's normal pattern of speech and behavior (their baseline). Deception is revealed through deviations from this norm, such as adding excessive, unnecessary details to a story to bolster its credibility.

Paltering is a specific form of dishonesty distinct from lying. It involves strategically using truthful statements to intentionally mislead someone into forming a false conclusion. This allows the speaker to deceive while maintaining plausible deniability of having lied.

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.

Omission is the most common form of lying because it minimizes cognitive load and psychological stress. To uncover hidden details without a polygraph, allow the person an open-ended narrative without interruption. Watch for transitional phrases like 'then,' 'next,' or 'after that,' which frequently bridge and conceal omitted details, then target those specific temporal gaps with direct yes-or-no questions.

When trying to deceive someone, admitting a genuine, less critical flaw can make you seem honest and self-aware. This vulnerability makes the primary lie more credible because the listener thinks, "Why would they tell me this bad thing if the other part wasn't true?"