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 12 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

Prediction Didn’t hold up
Musk in 2016: Human travel to Mars could happen by 2026
“It's a meaningful number of people going to Mars I. I think this is potentially something that can be accomplished in about 10 years maybe sooner , maybe nine years.”
Elon Musk Sep 15, 2016 ▶ 10:14 Elon Musk : How to Build the Future · Y Combinator
Prediction Didn’t hold up
Best: Newsletters will replace social feeds for news within five years
“I think the answer is it won't replace the social network aspect of it. The thing that Facebook and the social networks are great at is having the relationship between you and like the people, you know, in real life... The part of it that should absolutely be …”
Chris Best May 15, 2019 ▶ 35:53 Monetizing Podcasts and Newsletters - Chris Best of Substack and Jonathan Gill of Backtracks · Y Combinator
Prediction Didn’t hold up
Preskill: Validated topological qubit may appear as soon as 2019
“And it's very ambitious, because at this point, it's not even clear they have a single qubit, but if that approach is successful, and we're, it's making progress, so I think we will see a validated Qubit of this type soon, maybe next year.”
John Preskill May 16, 2018 ▶ 28:45 John Preskill on Quantum Computing · Y Combinator
Prediction Didn’t hold up
Garg: The biggest crypto winners will likely re-centralize in Silicon Valley
“I think you could have the inspiration for ideas come from underserved markets, but I wouldn't be surprised if the really big winners in crypto actually sort of re-centralize around Silicon Valley.”
Avichal Garg May 2, 2018 ▶ 15:02 Crypto Investors - Linda Xie and Avichal Garg · Y Combinator
Prediction Didn’t hold up
Musk: Neuralink will do first human vision implants in 6-12 months
“And then I think in the next six to 12 months, we'll be doing our first implants for vision, where even if somebody's completely blind we can write directly to the visual cortex.”
Elon Musk Jun 19, 2025 ▶ 45:03 Elon Musk: Digital Superintelligence, Multiplanetary Life, How to Be Useful · Y Combinator
Prediction Didn’t hold up
Best: Podcast ad rates per download will drop significantly
“I suspect as I kind of hinted before that there's a lot of podcast advertising that's in a little bit of like an emperor's new clothes state where like too much is it's overpriced. And because there's just not metrics there, it's just like waiting for like som…”
Chris Best May 15, 2019 ▶ 40:40 Monetizing Podcasts and Newsletters - Chris Best of Substack and Jonathan Gill of Backtracks · Y Combinator
Prediction Didn’t hold up
Allred: Lambda School may launch a nursing school by late 2019
“So you know, we're not working on it right, right now, but don't be surprised if you hear by the end of this year, an announcement that Lambda nursing is going live and we're launching a nursing school”
Austen Allred Apr 3, 2019 ▶ 31:36 A CS Education That's Free Until You Get a Job - Austen Allred of Lambda School · Y Combinator
Prediction Didn’t hold up
Akinlade in 2018: Nigeria's population will exceed the US in five years
“Like in the next five years, I think Nigeria is going to be even more than the US.”
Shola Akinlade Oct 16, 2018 ▶ 40:15 Helping African Businesses Get Paid, Shola Akinlade of Paystack · Y Combinator
Prediction Didn’t hold up
Schwartz: Paid ad budgets will suffer substantial cuts under GDPR
“The other big advantage is that paid budgets are now going to take a huge hit. Because of GDPR, we've gone to this nightmare scenario where you don't know if your paid budgets are working because you can't track users until users Agree to be tracked.”
Eli Schwartz Sep 27, 2018 ▶ 40:25 SEO Advice from SurveyMonkey Director of SEO and Growth, Eli Schwartz · Y Combinator
Prediction Didn’t hold up
Slavin Predicts 98% of Americans Will Own Smartphones by 2019
“And by 2019, that's 98%. 98% of the United States will have smartphones, you know, even Obama phones or smartphones. You won't be able to buy a non-smartphone in 2019.”
Kevin Slavin Dec 6, 2017 ▶ 51:15 There's an Art to Getting Brilliant People to Surprise Themselves - Kevin Slavin of The Shed · Y Combinator
Prediction Didn’t hold up
Ning: Well-capitalized Canadian public companies will drive US cannabis consolidation
“I think part of the whole like consolidation pattern that will Come just because the market's so fragmented right now will be heavily pressurized by Canadian like publicly traded, heavily capitalized companies. Just because they're coming in and they're buying…”
Vincent Ning Oct 11, 2018 ▶ 30:16 Cannabis Startup Founders David Hua and Vincent Ning on Legalization, Banking, and Industry Trends · Y Combinator
Prediction Didn’t hold up
Bromberg: Startup liquidity timelines will revert to moving faster again
“Certainly in the last few years we've seen, ah, the speed to liquidity go down, ah, we think that's gonna revert back and we're gonna see that, that come faster again.”
Andy Bromberg Mar 9, 2018 ▶ 7:30 Andy Bromberg - Startup Investor School Day 4 · Y Combinator
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