alt Hacker NewsThanks for sharing this. I got all 4, but none of which were so obvious that I had absolutely no doubt. I had to reason about all of them. And I'm absolutely confident that a LOT of perfectly reasonable people can potentially score zero on this test.
Same. Managed all 4. But the differences are tiny and I'm only 70% confident. Most of my judgement is based on human reactions to a changing situation.