Truth-Default Theory
Updated 2026-08-08
INTRODUCTION
English translation pending.
CORE DEFINITION
Developed by Timothy Levine, truth-default theory holds that people process incoming communication as truthful by default and only shift to a state of suspicion when triggered by specific cues or circumstances. The default is adaptive, since treating every statement as potentially false would make ordinary cooperation prohibitively costly. The theory explains why accuracy in detecting deception is generally near chance and why lies often succeed. Key qualification: the default can be overridden, and evidence detects deception better than behavioral cues do.
SCAFFOLDING EFFECT
Reduce cognitive load
- Expect the default: assume that your initial reading of a claim is credulous rather than skeptical. - Raise the stakes check: switch to verification where the consequences of being deceived are large. - Use evidence over cues: rely on documentation and cross-checks rather than on how someone behaves.
Anchor fast decisions
Treating communication as truthful by default keeps the cost of ordinary interaction low, because verifying everything would be prohibitive. Suspicion requires a trigger, and absent one the content is accepted and integrated as fact. This makes deception profitable, since a liar needs only to avoid triggering suspicion rather than to appear genuinely credible.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Truth-default_theoryverified
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