Sources for Two High-Signal Reads on Housing Stagnation and AI-Assisted Proof Safety

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Most compelling: Ugly architecture stops homes getting built

Content type: Essay from Works in Progress.
Author/creator: SCP Hughes (@SCP_Hughes). Link:Works in Progress.
Recommended by: Patrick Collison, who calls it an important contribution for anyone interested in material progress.
Key takeaway: The essay argues that ugliness is not chiefly a driver of opposition from local residents; instead, unattractive modernist architecture helped mobilize a broader, nonlocal backlash that made heritage conservation restrictive and slowed redevelopment.
Why it matters: It offers a useful causal lens on housing scarcity: conservation is concentrated in economically important city centers, displacing development toward the periphery, while central densification would create housing where it is most needed and contribute to growth.

Content type: Technical blog post and incident postmortem.
Author/creator: The Lean project / Lean FRO. Link:Postmortem for Kernel Soundness Bug #14576.
Recommended by: Tim Sweeney, who calls the response an exemplary handling of a Lean theorem-prover and proof-verifier bug.
Key takeaway: An AI-assisted, sorry-free “disproof” of the Collatz conjecture exposed a kernel implementation bug that could make Lean accept a proof of False; the issue was reduced to a small reproduction and fixed within an hour, with new patch releases issued.
Why it matters: The postmortem is a concrete resource for anyone using AI in formal systems: it explains why an untrusted elaborator must remain separated from an independently soundness-checking kernel, then documents regression tests, follow-up hardening, and ongoing independent checking.

Two High-Signal Reads on Housing Stagnation and AI-Assisted Proof Safety