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
Karpathy: llm.c was 20% faster and used 30% less memory than PyTorch
“At the time of that post, we were using, in LL and that's in 30% less memory, and we were 20% faster in training, just the truth.”
Andrej Karpathy Sep 21, 2024 ▶ 19:10 llm.c's Origin and the Future of LLM Compilers - Andrej Karpathy at CUDA MODE
Assertion Supported
Sohmers: AMD's PyTorch fork lagged official releases by 6-9 months
“And AMD had their own separate you know, non-mainline PyTorch distribution for years. That was always six to nine months behind any new PyTorch releases.”
Thomas Sohmers Aug 18, 2025 ▶ 20:06 ⚡️Accelerators @ 3x NVIDIA H200 perf, Made in the USA - Thomas Sohmers + Mitesh Agrawal, Positron AI
Assertion Supported
PyTorch was originally built for researchers without considering production requirements
“PyTorch actually started as the framework for researchers. Don't care about production at all.”
Lin Qiao Nov 25, 2024 ▶ 4:22 Why Compound AI + Open Source will beat Closed AI — with Lin Qiao, CEO of Fireworks AI
Assertion Supported
Hotz: Tinygrad is about 5x slower than PyTorch on Nvidia GPUs
“The correctness for both forwards and backwards passes is there, but on Nvidia, it's about five X slower than PyTorch right now.”
George Hotz Jun 20, 2023 ▶ 21:15 Ep 18: Petaflops to the People — with George Hotz of tinycorp
Assertion Supported
TorchLean enables defining PyTorch-like neural networks directly in Lean
“So what it really enables is that you can now write neural networks essentially in Lean. So instead of writing in, like, PyTorch, it's like a PyTorch-like abstraction, but you can, like, kind of, you know, write it in Lean, and so it can be fully formalized in…”
Anima Anandkumar Aug 26, 2026 ▶ 6:45 🔬 Why Transformers Hit a Wall the Moment Physics Shows Up — Anima Anandkumar, Caltech
Assertion Supported
Chintala: PyTorch is used in Mars rover simulations, drug discovery, and Tesla
“It's used in Mars rover simulations, to drug discovery, to Tesla cars, and there's a huge diversity of, like, applications in which it is used in.”
Soumith Chintala Mar 6, 2024 ▶ 30:47 Open Source AI is AI we can Trust — with Soumith Chintala of Meta AI
Assertion Supported
Chintala: CERN uses PyTorch and GANs for particle physics research
“I think the scariest was when I went to visit CERN at some point, and they said they were using it, PyTorch, and they were using GANs at the same time for, like, particle physics research, and I was scared more about the fact that they were using GANs than the…”
Soumith Chintala Mar 6, 2024 ▶ 31:21 Open Source AI is AI we can Trust — with Soumith Chintala of Meta AI
Assertion Contradicted
Chintala: PyTorch is around 190,000 lines of code
“PyTorch is like a 190,000 lines of code or something at this point.”
Soumith Chintala Mar 6, 2024 ▶ 6:37 Open Source AI is AI we can Trust — with Soumith Chintala of Meta AI
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