<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>Oliver J. Cho</title><description>Oliver J. Cho — New York. Alpine Research (RoomJudge, Dialed), Seed Artists, and notes.</description><link>https://oliverjcho.com/</link><item><title>Two Necessities in a Machine-Checked Ethics: What Survives Without Causa Sui</title><link>https://oliverjcho.com/writing/what-survives-without-causa-sui/</link><guid isPermaLink="true">https://oliverjcho.com/writing/what-survives-without-causa-sui/</guid><description>Toggling causa sui and modal bridge axioms in a Lean 4 formalization of Spinoza’s Ethics Part I—and watching which theorems hold, fail, or split apart.</description><pubDate>Sat, 14 Nov 2026 00:00:00 GMT</pubDate></item><item><title>Why &apos;Over-Extracted&apos; Is Usually Two Different Problems</title><link>https://oliverjcho.com/writing/why-coffee-tastes-off/</link><guid isPermaLink="true">https://oliverjcho.com/writing/why-coffee-tastes-off/</guid><description>Most brewing advice collapses four independent physical outputs—strength, average extraction, flow evenness, and body—into a single dial.</description><pubDate>Sat, 14 Nov 2026 00:00:00 GMT</pubDate></item></channel></rss>