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 7 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
Study of 30,000 careers shows youth success negatively correlates with adult success
“There was just a paper in science, you know, one of the probably two most prestigious scientific journals in the world. It aggregated about 30,000 careers of musicians, scientists, athletes, And what it found was basically the thesis of range that the indicato…”
David Epstein May 15, 2026 ▶ 2:29 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
Elite athletes spend less early time in deliberate practice than lower-level peers
“The data that actually track, yes, elite athletes spend more time in deliberate practice than lower level athletes, but the studies that track them over the course of their development show that early on they spent less time In deliberate practice in that acti…”
David Epstein May 15, 2026 ▶ 24:16 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
Epstein: Founders trained in the scientific method pivot more and succeed more
“And some of them were randomized to get trained in, in a scientific method version of this, where they make a hypothesis about what do they think is their value add. And then they have to commit to a way to go test it. And some decision rule, you know, ah, the…”
David Epstein May 15, 2026 ▶ 19:04 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
The US is the only nation where most say others lack morals
“I just saw there was a Pew survey out that showed America is now the only country where a majority of adults, it was a small majority, but a majority, said that other people have bad morals.”
David Epstein May 15, 2026 ▶ 29:18 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
Epstein: General Magic Was Silicon Valley's First Concept IPO
“They had real-time footage of this company that was the first so-called concept IPO in Silicon Valley history, where Goldman Sachs took them public with an idea, not a product, and they were basically making the iPhone, you know, 20 years too early, and resour…”
David Epstein May 15, 2026 ▶ 7:27 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
Epstein: NASA's LCROSS probe used Army tank and NASCAR parts
“And they couldn't build from scratch, so they had to borrow technology, so they took imaging equipment from army tanks and engine temperature sensors from NASCAR and built a probe that confirmed water on the moon.”
David Epstein May 15, 2026 ▶ 17:08 Author David Epstein: You can’t innovate without this | Masters of Scale
Assertion Supported
National surveys show trusting strangers is tightly correlated with per capita GDP
“The proportion of people that answer in surveys, they trust strangers, tightly related to per capita GDP on a national basis.”
David Epstein May 15, 2026 ▶ 29:05 Author David Epstein: You can’t innovate without this | Masters of Scale
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