Why do we think we understand the world more than we actually do?
The illusion of explanatory depth (IOED) is a cognitive bias where people overestimate how well they can explain how everyday objects work. When asked to detail the mechanisms, gaps in their knowledge become apparent, revealing shallower understanding than assumed. Research shows this bias appears early in childhood and is stronger for explanatory knowledge than for factual or procedural knowledge.
- ▪IOED describes the tendency to believe we understand complex systems, like toilets or car engines, more deeply than we actually do.
- ▪The bias becomes evident when individuals are required to explain a concept, exposing gaps in their knowledge.
- ▪Studies indicate that even kindergarten children overestimate their explanatory knowledge, and the effect is stronger for explanations than for facts or procedures.
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| Original publisher | The Decision Lab |
| Canonical URL | https://thedecisionlab.com/biases/the-illusion-of-explanatory-depth |
| Publication time | Tue, 28 Jul 2026 04:00:41 +0000 |
| Retrieval time | 2026-07-28T04:53:17.904Z |
| Last seen | 2026-07-28T04:53:17.904Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | H6MAD48BGDE- · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Why do we think we understand the world more than we actually do?The The Illusion of Explanatory Depth, explained.BiasWhere this bias occursWhere this bias occursIndividual effectsSystemic effectsWhy it happensWhy it is importantHow to avoid itHow it all startedHow it affects productExample 1Example 2SummaryRelated TDL articlesWhere this bias occursIndividual effectsSystemic effectsWhy it happensWhy it is importantHow to avoid itHow it all startedHow it affects productExample 1Example 2SummaryRelated TDL articlesWhat is the Illusion of Explanatory Depth?The illusion of explanatory depth (IOED) describes our belief that we understand more about the world than we actually do.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at The Decision Lab.
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