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← A test checks a handful of examples; a proof settles an infinite state…
17 connected korrents · 15 moments from 21 Jan 2019 to 12 Sept 2026.
Everything filed under formal proof
formal proof
Everything filed under coding agents
coding agents
Everything filed under developer tools
developer tools
Everything filed under code generation
code generation
Everything filed under mathematics
mathematics
Everything filed under software quality
software quality
Everything filed under simplicity
simplicity Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Read this korrent: A test checks a handful of examples; a proof settles an infinite state space, which is why formal methods can say things testing never can. A test checks a handful of examples; a proof settles an infinite state space, which is why formal methods can say things testing never can. Last stated 6 months ago
22 Apr 2026
MK
Martin Kleppmann — holds since 2026-04-22 — tap for who they are
Same subject: A proof and an explanation are different things, and a theorem can stay an unsolved expository problem long after it is proved. — tap to centre the map on it A proof and an explanation are different things, and a theorem can stay an unsolved expository problem long after it is proved. Last stated 4 months ago
30 Jun 2026
GS
Grant Sanderson — holds since 2026-06-30 — tap for who they are
Same subject: Formalisation's real gift is the green check mark — knowing a hard proof is correct before you spend time on it — and every other field would kill for it. — tap to centre the map on it Formalisation's real gift is the green check mark — knowing a hard proof is correct before you spend time on it — and every other field would kill for it. Last stated 4 months ago
30 Jun 2026
GS
Grant Sanderson — holds since 2026-06-30 — tap for who they are
Same subject: Formal methods are a niche tool; property-based testing is the one most engineers should adopt, and stopping there is a fine place to stop. — tap to centre the map on it Formal methods are a niche tool; property-based testing is the one most engineers should adopt, and stopping there is a fine place to stop. Last stated 3 months ago
29 Jul 2026
HW
Hillel Wayne — holds since 2026-07-29 — tap for who they are
Same subject: Every genuine test of a theory is an attempt to refute it — tap to centre the map on it Every genuine test of a theory is an attempt to refute it
KP
Karl Popper — holds since c. 1963–1968 — tap for who they are
Same subject: The hard part of verification is not proving the code correct but working out what the specification should say. — tap to centre the map on it The hard part of verification is not proving the code correct but working out what the specification should say. Last stated 8 years ago
21 Jan 2019
HW
Hillel Wayne — holds since 2019-01-21 — tap for who they are
Same subject: Covering every line of code in tests does not guarantee covering every possible program state. — tap to centre the map on it Covering every line of code in tests does not guarantee covering every possible program state. Last stated 5 months ago
7 Jun 2026
SS
Salvatore Sanfilippo — holds since 2026-06-07 — tap for who they are
Same subject: There is a permanent trade-off in verification: an expressive language is hard to prove things about, and a language that is easy to prove things about is hard to write in. — tap to centre the map on it There is a permanent trade-off in verification: an expressive language is hard to prove things about, and a language that is easy to prove things about is hard to write in. Last stated 8 years ago
21 Jan 2019
HW
Hillel Wayne — holds since 2019-01-21 — tap for who they are
Same subject: A conclusion cannot rest on its simplicity alone; it must be backed by empirical evidence. — tap to centre the map on it A conclusion cannot rest on its simplicity alone; it must be backed by empirical evidence. Last stated 7 years ago
28 Oct 2019
SP
Shane Parrish — holds since 2019-10-28 — tap for who they are
Same subject: A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year. — tap to centre the map on it A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year. Last stated 3 months ago
27 Jul 2026
BC
Boris Cherny — holds since 2026-07-27 — tap for who they are
Same subject: Agents are the new compilers that compile intent into fast software. — tap to centre the map on it Agents are the new compilers that compile intent into fast software. Last stated a month ago
12 Sept 2026
GR
Guillermo Rauch — holds since 2026-09-12 — tap for who they are
Same subject: AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. — tap to centre the map on it AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. Last stated 3 months ago
26 Jul 2026
DH
David Heinemeier Hansson — holds since 2026-07-26 — tap for who they are
Same subject: "I don't know" becomes a kind of superpower when you can work with Claude Code to figure things out. — tap to centre the map on it "I don't know" becomes a kind of superpower when you can work with Claude Code to figure things out. Last stated 7 months ago
19 Mar 2026
KP
Kris Puckett — holds since 2026-03-19 — tap for who they are
Same subject: A coding agent does not learn from its mistakes the way a person does -- it repeats the same error indefinitely unless a human notices and writes it down. — tap to centre the map on it A coding agent does not learn from its mistakes the way a person does -- it repeats the same error indefinitely unless a human notices and writes it down. Last stated 7 months ago
25 Mar 2026
MZ
Mario Zechner — holds since 2026-03-25 — tap for who they are
Same subject: A coding-agent company should not train its own model: it has to stay neutral ground for models to compete on. — tap to centre the map on it A coding-agent company should not train its own model: it has to stay neutral ground for models to compete on. Last stated 2 months ago
3 Sept 2026
DR
Dax Raad — holds since 2026-09-03 — tap for who they are
Same subject: A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. — tap to centre the map on it A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. Last stated 5 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. — tap to centre the map on it A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. Last stated a year ago
18 Sept 2025
TL
Tobias Lütke — holds since 2025-09-18 — tap for who they are
Same subject: A new API framework that ignores how existing apps were historically built undermines its own introduction — tap to centre the map on it A new API framework that ignores how existing apps were historically built undermines its own introduction Last stated 2 months ago
31 Aug 2026
CH
Craig Hockenberry — holds since 2026-08-31 — tap for who they are