Blog · diary learned together

Not a master's lecture,
a researcher's diary.

1-5 of 5

2026.05.11·Fail School
Use AI as a Mirror, Not an Answer Machine (Research That Resists Hallucination)
A fictional 3-day waste from an "82% use it" AI answer shows the danger of hallucination. A 30-minute Perplexity/ChatGPT/Claude workflow and 5 ways to filt
2026.05.11·Fail School
5 Questions Before Building (A Sustainability Check)
Not a "decent idea" but an idea you can stick with for a year. Paul Graham's YC philosophy and Toss's 8-fails-9-tries: a 5-question diagnosis.
2026.05.10·Fail School
90% of MVPs Are Fake: The Real Definition of MVP
The real reason a delivery app that spent 6 months building failed. It's V (Viable), not M (Minimum), that decides the fate of your MVP.
2026.05.10·Fail School
Why You Should Build an MVP Now (The 14-Day Maker Era)
An era where even people who don't code can meet their first users within 7 days. The structural shift proven by Kakao Mobility, Toss, and Daangn, and a 14
2026.05.10·Fail School
[Fail School S1] In the AI Era, One Person Builds What 16 Couldn't
An SI founder running a 3 billion KRW agency confesses he "became a liar." Fail School Season 1, a 16-part series, begins.