Trending
Most Financial Advisors don’t suffer from a lack of intelligence, education, or experience. Many Advisors, however, suffer from something far more subtle — and far more dangerous.
It’s called the illusion of explanatory depth.
And it quietly undermines conversations every single day.
What Is the Illusion of Explanatory Depth?
The illusion of explanatory depth is a cognitive bias that causes these Advisors to believe they understand something much more deeply than they actually do.
We think we “get it” — until we’re asked to explain it clearly, step by step, in plain language.
That’s when the illusion collapses.
Suddenly, explanations become:
-
Vague
-
Circular
-
Jargon-heavy
-
Or filled with phrases like “you know”, “basically”, and “it’s complicated”
In other words, confidence without clarity.
Who Coined the Term?
The phrase “illusion of explanatory depth” was coined by Leonid Rozenblit and
Frank Keil.
In their 2002 research, they asked participants to rate how well they understood everyday mechanisms — things like:
-
How a zipper works
-
How a toilet flushes
-
How a bicycle stays upright once it’s moving
People consistently rated their understanding as high.
Then the researchers asked them to explain the mechanism in detail.
Confidence plummeted.
Participants suddenly realized they didn’t understand the process nearly as well as they thought.
The key insight from the research was simple — and profound:
Familiarity creates the illusion of understanding.
Ask someone this simple question:
“Do you understand how a zipper works?”
Most people say yes without hesitation.
They’ve:
-
Used one every day
-
Fixed one when it jammed
-
Watched it open and close thousands of times
So, their confidence is high.
Then ask the follow-up:
“Okay—explain, step by step, how a zipper actually works.”
That’s when the illusion collapses.
People quickly realize they can’t clearly explain:
-
How the two sides interlock
-
Why the slider matters
-
What mechanism actually creates the seal
They know that it works —
but not how it works.
That gap between confidence and explanation is the illusion of explanatory depth.
The illusion isn’t about complexity.
It’s about familiarity.
-
Zippers feel obvious
-
They’re familiar, everyday objects
-
There’s no intimidation factor
Here is my point:
If we overestimate our understanding of something as simple as a zipper, imagine how easily we do it with:
-
Inflation
-
Risk
-
Volatility
-
Tax efficiency
Why Financial Advisors Are Especially Vulnerable
Financial Advisors operate in a perfect storm for this bias.
You deal with:
-
Abstract concepts
-
Invisible mechanisms
-
Probabilistic outcomes
-
Long time horizons
-
Constant repetition
You’ve explained diversification, risk, volatility, inflation, sequence of returns, and tax efficiency hundreds — maybe thousands — of times.
That repetition creates fluency.
And fluency feels like mastery.
But here’s the trap:
Knowing how to use a concept is not the same as knowing how to explain it simply.
Advisors often understand concepts well enough to:
-
Make good decisions
-
Design sound portfolios
-
Pass licensing exams
But that doesn’t guarantee they can:
-
Explain those ideas cleanly
-
Start from the client’s point of view
-
Strip away assumptions
-
Use language that calms instead of overwhelms
So, when an Advisor says, “I’ve explained this many times,” they may be right — and still not be clear.
What Advisors Should Say to Clients (and Why It Works)
One of the most powerful things an Advisor can do is set expectations about clarity upfront — and give clients permission not to understand everything immediately.
Here’s a short story you can use early in a relationship or before explaining a complex topic to a client:
“Let me give you a quick example.”
“Most people think they understand how a bicycle works.
They’ve ridden one their whole life.”
“But if I asked you right now to explain — step by step —
why a bicycle doesn’t fall over when it’s moving… most people can’t.”
(Pause)
“They suddenly realize they don’t understand it nearly as well as they thought.”
“That’s something psychologists call the illusion of explanatory depth.
We confuse familiarity with real understanding.”
“And here’s why I bring that up.”
“In my world — finance — this happens all the time.
We work with ideas so often that they start to feel obvious to us.”
“But I want to be very clear about something.”
‘If it’s clear in my head but not clear in yours, it’s not clear yet.’
“So, my job isn’t to sound smart.
My job is to explain things in a way that makes sense to you.”
“And when you can explain it comfortably to someone else —
that’s how I know we’re aligned.”
Why This Matters More Than Any Explanation
This short story does something most explanations fail to do.
It:
-
Lowers the client’s guard
-
Normalizes confusion
-
Signals humility instead of superiority
-
Repositions clarity as a shared responsibility
Most importantly, it tells clients — without saying it outright — “You won’t be judged here for asking questions.”
That single shift changes everything.
Clients listen differently.
They engage more honestly.
They’re far more likely to speak up when something doesn’t land.
The Real Takeaway
The illusion of explanatory depth isn’t a flaw in intelligence.
It’s a flaw in assumption.
Many Advisors assume:
-
“I’ve explained this clearly before.”
-
“This is basic.”
-
“They’re following me.”
But understanding doesn’t transfer automatically.
It has to be rebuilt, one conversation at a time, from the client’s point of view.
And that’s why this line matters so much:
“If it’s clear in my head but not clear in yours, it’s not clear yet.”
That’s not a communication technique.
That’s a philosophy.
And Advisors who live by it don’t just explain better —
they earn trust faster, calm anxiety sooner, and build relationships that last.
The Hidden Damage in Client Conversations
The illusion of explanatory depth doesn’t show up as obvious confusion.
It shows up as polite nodding.
Clients rarely interrupt to say:
-
“I don’t follow.”
-
“That went over my head.”
-
“Can you back up?”
Instead, they nod.
They thank you.
They leave.
And later, they:
-
Second-guess decisions
-
Fail to follow through
-
Lose confidence during volatility
-
Or quietly move assets elsewhere
Not because the advice was wrong —
but because understanding never truly landed.
This Is Not the Curse of Knowledge (But It Feeds It)
It’s important to make a distinction.
-
The illusion of explanatory depth is about overestimating your own understanding.
-
The curse of knowledge is about forgetting what it’s like not to know.
They are different — but closely related.
The illusion convinces you that your explanation is clear.
The curse of knowledge convinces you it should be clear.
Together, they create conversations that sound smart… and fail to connect.
How You Can Overcome the Illusion
The solution isn’t more expertise.
It’s better self-testing.
Here are four practical ways you can break the illusion — and dramatically improve clarity.
1. Force Yourself to Explain Without Jargon
Take a core concept — diversification, volatility, or inflation — and explain it:
-
Without acronyms
-
Without technical terms
-
As if the listener were 12 years old
If you struggle, that’s not a failure.
That’s valuable feedback.
Clarity begins where struggle appears.
2. Practice the “Blank Page Test”
Before a client meeting, ask yourself:
If I had to explain this idea from scratch, on a blank page, what would I say first?
Not the middle.
Not the conclusion.
The beginning.
Most Advisors start explanations too far downstream because they forget how much scaffolding understanding requires.
3. Ask Clients to Reflect, Not Repeat
Instead of asking:
-
“Does that make sense?”
Ask:
-
“What part of that feels most important to you?”
-
“How would you explain that to your neighbor tonight?”
-
“What stood out?”
Reflection reveals understanding.
Yes-or-no questions don’t.
4. Treat Confusion as a Signal, Not a Threat
When a client looks uncertain, don’t defend the explanation.
Slow down.
Say:
-
“Let me try that a different way.”
-
“I may have skipped a step.”
-
“Let’s simplify this.”
Confidence grows when clients feel you care more about their understanding than your expertise.
The Bigger Lesson
The illusion of explanatory depth teaches us something humbling:
Understanding isn’t proven by knowing — it’s proven by explaining.
The best Advisors aren’t the ones who know the most.
They’re the ones who can:
-
Make complexity feel manageable
-
Turn uncertainty into calm
-
And leave clients thinking, “That finally makes sense.”
Clarity isn’t a talent.
It’s a discipline.
And every time you force yourself to explain more simply than feels necessary, you don’t diminish your expertise.
You reveal it.
Final Thought
If clients don’t act on what you say, it’s rarely because they disagree.
More often, it’s because they didn’t fully understand — and didn’t feel safe admitting it.
Your job isn’t to sound smart.
Your job is to make understanding unavoidable.
If this was helpful, I’d appreciate you sharing it with another Advisor who might benefit.