Riddle: A city has one million inhabitants which one hundred are terrorists. Facial recognition software has been installed on security cameras to sound an alarm when detecting a terrorist. There are two bugs: 1. False negative: When scanning a terrorist, the alarm will only sound 99 percent of the time. 2. False positive: When scanning a non-terrorist, the alarm will incorrectly be triggered 1 percent of the time. The alarm sounds. What is the approximate probability that the inhabitant is a terrorist? a) 99 percent b) 98 percent c) less than one percent
Answer: C. Even though the bugs rarely apply, there are way more civilians than terrorists and less than one percent of the city are terrorists.
Riddle: You are stuck in a room with no air that humans can breathe. Three exits lead to three tightly closed doors: One exit leads to deadly machinery. The second has a door leading to a deadly dimension. The third one is blocked by a blazing fire. Which door should you choose?
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