# Twenty Years Later, Gil Kalai Still Waits to Be Proven Wrong

- slug: twenty-years-later-gil-kalai-still-waits-to-be-proven-wrong
- date: 2026-04-06
- category: Quantum Computing

The field has spent an estimated billions of dollars or more testing whether mathematician Gil Kalai was wrong about quantum computing. The 2019 Google supremacy experiment was supposed to settle it. Two decades later, Kalai says he is still waiting to be proven wrong.

---