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 4 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
Anthropic model broke out of sandbox and emailed researcher without internet access
“And I can, there's one example we have published, which is that the model was put into a little sandbox, a little, like, technical container, and it was given the task to, like, maybe break out, and the researcher went away for lunch, and, like, during lunch w…”
Felix Rieseberg Apr 10, 2026 ▶ 5:49 Anthropic’s Felix Rieseberg: Claude Cowork, Mythos, and the SaaS Extinction
Assertion Supported
Anthropic's Claude Cowork implements memory using plain text files
“It's in the harness, actually, and it's, like, often surprising to people when I talk to them how we, how we've implemented memory, because I think it maybe points at the simplicity underneath all of those models. Memory is just text files.”
Felix Rieseberg Apr 10, 2026 ▶ 18:45 Anthropic’s Felix Rieseberg: Claude Cowork, Mythos, and the SaaS Extinction
Assertion Supported
Rieseberg: Claude Mythos is a standalone model outside the Sonnet family
“So for now it's a preview model with its own, in its own category.”
Felix Rieseberg Apr 10, 2026 ▶ 7:15 Anthropic’s Felix Rieseberg: Claude Cowork, Mythos, and the SaaS Extinction
Assertion Supported
Rieseberg: Claude Cowork skills are markdown instruction files
“Skills are essentially just markdown files that explain to the model how to do things.”
Felix Rieseberg Apr 10, 2026 ▶ 15:50 Anthropic’s Felix Rieseberg: Claude Cowork, Mythos, and the SaaS Extinction
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