Why a casual question can suddenly feel like a Fermi problem
0. The short answer: the question is not necessarily weird; the problem is huge
Imagine someone asks:
“Do I suddenly ask weird questions sometimes?”
Then the example turns out to be:
“If you could meet only one person in the whole world, who would you want to meet?”
The question itself is not bizarre. It is simply enormous when dropped into a conversation without warning.
By contrast, “Want to kiss?” may carry much higher social stakes, but the answer space is fairly clear: yes, no, maybe, not now.
“One person in the whole world” is different.
Living people only? Historical figures too? Friends allowed? Do you just meet them, or actually talk? Someone you admire? Someone you love? Someone who would be interesting? And why am I being asked this right now?
A casual chat has suddenly connected you to the entire human database.
It is basically the conversational version of:
“How many utility poles are there in Japan?”
1. The difficulty is search space × evaluation criteria × context
Three things make this kind of question heavy.
1. The search space is too broad
“One friend” is searchable.
“One favorite actor” is searchable.
“One person in the entire world” means the candidate set is basically humanity.
You do not literally scan every person, of course. The problem is that you do not even know which shelf to search.
2. There is no evaluation criterion
“Want to meet” can mean many things.
Ask for life advice. Meet an idol. Hear history firsthand. Talk about work. Have dinner. Meet romantically.
Change the criterion and the winner changes.
Before answering, the respondent has to invent the ranking itself.
3. The conversational context suddenly changes
If the previous topic was completely different, a giant hypothetical forces the listener to process not only the content but also:
“Why this question now?”
That is why “Why are you asking?” may arrive before an actual answer.
It does not necessarily mean the person dislikes the question. They may simply be trying to understand the task.
2. Why it feels like a Fermi problem
Technically, “Who would you meet?” is not a Fermi estimation problem.
But the experience is similar.
If someone asks, “How many utility poles are there in Japan?”, you first create assumptions.
Estimate from land area? Households? Separate cities and rural areas? What counts as a pole?
Likewise, “one person in the world” requires hidden setup.
Define the candidate pool. Define the ranking criterion. Decide whether a quick answer or a carefully considered answer is expected.
The task definition comes before the answer.
A casual conversation has quietly turned into a case interview.
3. “That’s hard to answer out of nowhere” may be processing delay, not rejection
When people repeatedly say, “That’s so sudden,” it is easy to conclude:
“Maybe my questions are strange.” “Maybe I should stop asking things like this.”
But another explanation is simpler.
The topic is interesting. The answer is not instantly retrievable. A little thinking would work. One extra constraint would make it easy.
So the problem may not be curiosity. It may be the input format.
If someone often responds with “Why are you asking?”, they may be checking the question’s purpose, range, or tone before committing to an answer.
There is no need to delete the interesting questions.
Just provide one search filter.
4. Research does not say “more options are always worse”
It would also be too simple to say that people always struggle when there are many options.
A 2010 meta-analysis of 50 studies, 63 conditions, and 5,036 participants found an average choice-overload effect close to zero, with substantial variation across studies.[1]
So “more choices are always bad” is not a universal law.
A 2015 meta-analysis covering 99 observations and 7,202 participants identified several important moderators, including choice-set complexity, decision-task difficulty, preference uncertainty, and the goal of minimizing effort.[2]
The “one person in the whole world” question stacks many of those conditions together.
Huge candidate pool. Unclear criteria. No objectively correct answer. And because it is casual conversation, the listener may not want to spend five minutes optimizing a response.
“No idea, that’s too sudden” is therefore not surprising.
5. Asking questions itself is not a conversational disadvantage
The opposite finding is also interesting.
A 2017 study of conversations reported that people who asked more questions, especially follow-up questions tied to what the other person had just said, tended to be seen as more responsive and were evaluated more positively.[3]
A 2025 correction adjusted some reported values, but stated that the main conclusions remained intact after an audit.[4]
That does not mean “ask as many questions as possible.”
The key is whether the question grows out of the conversation.
“I went to a concert yesterday.” “Oh, whose concert?”
That follows the thread.
“I went to a concert yesterday.” “By the way, if you could meet one person in the world, who would it be?”
That submits a completely new job to the conversational CPU.
This is less a question-quality problem than a job-scheduling problem.
6. The fix is simple: add one search condition
No elaborate communication technique is required.
Before asking a huge question, add just one of these.
A. Narrow the candidate pool
“If it had to be a celebrity, who would you meet?”
“If you could meet one historical figure, who?”
Now humanity has become a category.
B. Add an evaluation criterion
“If you could talk to one person, who would you want advice from?”
“If you could have dinner with one person, who?”
Now the ranking has a purpose.
C. Explicitly allow a rough answer
“Just the first person who comes to mind: if you could meet anyone, who would it be?”
This is extremely effective.
The task changes from “find the optimal answer” to “give me the first plausible candidate.”
No global championship is required.
7. Before and after
Before
“If you could meet one person in the whole world, who?”
After
“First person who comes to mind: if it had to be a celebrity, who would you meet?”
Before
“If you could go anywhere, where would you go?”
After
“If you could travel for free this weekend, would you choose somewhere domestic or overseas?”
Before
“What matters most in life?”
After
“Right now, which matters most to you: time, money, or relationships?”
The interesting part of the question survives.
Only the invisible setup work disappears.
8. Conclusion: keep the curiosity; make the problem statement kinder
People who ask unexpected questions can make conversations much more interesting.
A chat can jump from dinner to philosophy, from philosophy to travel, and then straight back to convenience-store snacks.
That unpredictability can be fun.
The trouble starts when a big question assumes that both people are already using the same search filters.
So add one handrail.
“Celebrities only.” “First answer that comes to mind.” “Someone you would want to talk to.”
That is enough.
Do not stop asking unusual questions.
Just add one line of assumptions to the conversational Fermi problem.
The question stays interesting, while “Why are you asking that?” and “I can’t answer that out of nowhere” become much less likely.
References (4)
- Scheibehenne, B., Greifeneder, R., & Todd, P. M. (2010). Can There Ever Be Too Many Options? A Meta-Analytic Review of Choice Overload. Journal of Consumer Research, 37(3), 409–425. DOI: 10.1086/651235
- Chernev, A., Böckenholt, U., & Goodman, J. (2015). Choice overload: A conceptual review and meta-analysis. Journal of Consumer Psychology, 25(2), 333–358. DOI: 10.1016/j.jcps.2014.08.002
- Huang, K., Yeomans, M., Brooks, A. W., Minson, J., & Gino, F. (2017). It Doesn’t Hurt to Ask: Question-Asking Increases Liking. Journal of Personality and Social Psychology, 113(3), 430–452. DOI: 10.1037/pspi0000097
- Correction to “It doesn’t hurt to ask: Question-asking increases liking” (2025). Journal of Personality and Social Psychology, 128(3), 669. DOI: 10.1037/pspi0000491
