Thursday assorted links by Tyler Cowen August 21, 2025 at 11:57 am 1. GPT-5 discovers some new mathematics. 2. David Wallace-Wells sanity on AI (NYT). 3. Deregulating the FDIC. 4. Study Islam! 5. Hal Varian has retired. 6. The Lisa Cook dispute (FT). 7. In some places a McDonald’s Big Mac meal has been selling for $18.99 (WSJ).