CONVERSATIONS — PERSONALITY & MANIPULATION
TIMOTHY R. LEVINE
Why You Can’t Tell When Someone Is Lying
In this conversation, communication researcher Timothy R. Levine explains why most lies are not detected in real time, why believing other people is usually adaptive, and what actually causes us to become suspicious. Drawing on Truth-Default Theory and decades of deception research, he explores prolific liars, trust, relationships, social correction, and what happens when falsehoods spread through groups and institutions.
Subtitles: German • English • Spanish
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"Most lies aren't detected in real time."
Oct 18, 2026
Published
50 Min
Duration
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TIMOTHY R. LEVINE
About this conversation
Key topics
Guest
Why are we so confident that we can recognize a lie when decades of research suggest otherwise? Timothy R. Levine challenges popular ideas about body language, eye contact, and other supposed signs of deception, and explains why human communication depends on a basic tendency to believe.
The conversation moves from everyday white lies and the cues that trigger suspicion to prolific and pathological lying, relationships with deceptive people, and the role of evidence in discovering the truth. It also explores a larger problem: what happens when false information is reinforced not by one person, but by social groups, shared beliefs and institutions.
Timothy R. Levine
Communication researcher and scholar of deception, lying, and interpersonal communication. Levine is best known for developing Truth-Default Theory.
Why body language cannot reliably reveal a lie
Truth-Default Theory and why believing others is adaptive
What actually triggers suspicion
Why a small minority accounts for a large share of lies
Prolific liars, relationships, and motivated reasoning
Trust, honesty, and social correction
Why confidence and charm can affect credibility
How falsehoods spread through groups and institutions
Episode highlights
00:00
03:22
05:43
09:07
13:05
16:49
22:01
27:51
30:14
34:54
36:24
38:10
40:24
44:42
46:39
Can You Really Spot a Liar?
Why We Default to Believing People
What Makes Us Suspect a Lie?
White Lies, Gender & Everyday Deception
How the Truth Default Gets Deactivated
When Is It Worth Investigating?
Why Some People Seem More Believable
When Lying Serves a Goal
Why a Few People Tell Most of the Lies
Pathological Liars
What Happens When You Live With a Prolific Liar?
Why Speaking Up About Deception Matters
Constructive Honesty: Telling the Truth Without Harming
Trust, Mistakes & “Truth Credits”
What Happens When Lies Take Over Systems?
"When information aligns with what I believe and what everybody in my social circle believes, I am almost certain to believe it, regardless of whether it's true or false."
TIMOTHY R. LEVINE
RELATED ARTICLE
ARTICLE
How to Tell If Someone Is Lying
Why body language fails, trust is adaptive, and evidence matters more than intuition.
Most deception is not uncovered by reading faces or spotting suspicious body language. It is discovered later, when evidence contradicts what we were told. Truth-Default Theory explains why believing others is the normal starting point of human communication, what causes that default to break down, and where our vulnerability to deception really lies.
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