The Ledger

Every statement that passed quotation and attribution checks. Mix any filter with any other: certainty 1/5, debate potential 5/5, or both at once.

clear all ✕

why aren't all 8 resolved? a statement only gets an assessment when the public record can support or contradict it. opinions and what-ifs never can, and 0 checkable ones are still open, waiting for their date. predictions held up or didn't; assertions are supported or contradicted. on every card: ▮▮▮▮▮ certainty · ▮▮▮▮▮ debate potential. speakers are clickable

Assertion Supported
Duolingo created 148 courses in one year using AI
“It took us, I think, 12 years to build the first hundred courses or so. And now, within one year, we built another 148 courses.”
Severin Hacker May 19, 2025 ▶ 4:22 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Hacker: Duolingo PM built initial chess course prototype using Cursor
“He was able to build this first version just using cursor and a bunch of AI tools. And the prototype is what convinced us that we should do this.”
Severin Hacker May 19, 2025 ▶ 41:16 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Hacker: Duolingo built its chess course in a record nine months
“Because of AI, again, we were able to build this within nine months. This is fastest way ever created a new course.”
Severin Hacker May 19, 2025 ▶ 42:02 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Hacker: Duolingo has never conducted employee layoffs
“By the way, we also never had a layoff.”
Severin Hacker May 19, 2025 ▶ 1:25:41 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Hacker: Duolingo was once bigger on TikTok than Nike
“I think at some point we were bigger on TikTok than Nike.”
Severin Hacker May 19, 2025 ▶ 55:36 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Duolingo was an launch partner for OpenAI's GPT-4 release
“We were one of the launch partners of OpenAI when they first launched GPT-IV”
Severin Hacker May 19, 2025 ▶ 3:19 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Product, Engineering, and Design Account for 70%-80% of Duolingo's Workforce
“Inside Duolingo, we have the three biggest functions within Duolingo are product, Engineering and design. Okay. Those compose probably about. 80%, 70 to 80% of our workforce.”
Severin Hacker May 19, 2025 ▶ 15:20 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
Assertion Supported
Hacker: Duolingo finance team grew from 2 to 25 post-IPO
“Before we went public, our finance team, for example, was two people. Now it's, I think, 25 or so.”
Severin Hacker May 19, 2025 ▶ 1:31:31 Duolingo Co-Founder, Severin Hacker: How AI Impacts the Future of Work and Education · 20VC with Harry Stebbings
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