Around our office, I go by a nickname: "the fill-in guy." Whenever a guest speaker cancels on short notice — a business leader, a broadcast guest — I'm the one who gets the call. It's happened enough times now that some people book me on purpose. That's how, a few years back, I ended up in front of 170 graduating seniors at a Korean university, asked to fill an empty slot in a career-counseling event.
Rather than give a standard lecture, we ran it as a Mind Catch Class — the format now used in the Agreement Rate Game — where students vote on a question with their smartphones, try to predict how their classmates answered, and watch the real distribution appear on screen in real time.
One question, on paper, couldn't have been simpler:
"Which district of Daejeon is the Daedeok Science Town located in?"
The room answered. The result was not close.
Live poll results, 170 graduating seniors
Here's what makes that number sting: this university's own campus sits inside Daedeok Science Town, in Yuseong-gu. These students had spent four years walking across that exact ground — to lecture halls, to the main lawn, to their club rooms — without ever registering that they were standing inside the very place the question was asking about. When the correct answer appeared on screen, the room didn't stay quiet. Students gasped. So did the professor standing next to me, who had assumed, like I had, that this would be an easy warm-up question.
What made the moment land wasn't that the students were wrong. It was the control group sitting right there in the room: nearly everyone in that same class knew, without hesitation, that their university itself is located in Yuseong-gu. The gap wasn't a gap in knowledge. It was a gap in connecting two things they each separately already knew.
The trap of a familiar word
Over four years on that campus, these students had walked past the district's other landmarks — a national research institute, a science museum, an international expo park — more times than they could count. They'd heard the phrase "Daedeok Science Town" used constantly, in campus announcements, in local news, in casual conversation. And yet none of that repetition ever crystallized into an actual, located fact.
What happened instead was a shortcut: the name "Daedeok" sounds like "Daedeok-gu," so that's where the brain filed it — no real thought required. Hearing a word often enough starts to feel like knowing it. It isn't the same thing.
The lecture that never finds out
The second insight is the more uncomfortable one. Universities, professors, and visiting business leaders — myself included, that day — routinely stand in front of students at exactly this school and talk about "innovation clusters" and "industry-academia collaboration," on the safe assumption that everyone in the room already understands the basic geography they're standing in.
But if a room full of students doesn't actually share that foundation, everything built on top of it risks landing as noise — technically audible, but disconnected from anything real to the listener.
This kind of gap almost never surfaces in a normal lecture. Students nod politely and quietly file the confusion away — because in most classrooms, admitting "I don't actually know that" out loud is its own kind of risk.
Why this only shows up when everyone answers at once
A single student raising a hand to ask "wait, where exactly is Daedeok Science Town?" would have been a minor, forgettable moment. What made this different was volume: 170 people answering anonymously, at the same time, with the real distribution displayed instantly on every phone in the room. That's what turned a quiet, private uncertainty into a shared, visible, undeniable fact about the room itself.
We talk a lot about communication today — more channels, more messages, more connection than any generation before us. But if a handful of words in a conversation are quietly misunderstood, no amount of talking fixes that. The understanding was never actually shared to begin with.
Where this goes next
That Daedeok Science Town career talk was an early run of what's now called Mind Catch Class — built on the same Agreement Rate Game engine used in Thankage's broadcast formats. Since then, the same format has been used in corporate training, where mutual understanding between teammates is exactly the point, and in career-guidance sessions for middle and high school students.
Literacy and comprehension are declining across age groups worldwide, and education authorities everywhere are searching for tools that can counter filter bubbles and confirmation bias. A format that can surface a gap like this one — instantly, anonymously, undeniably — may be one small part of the answer.