So let's see if I have this right. * You've never met a 10x engineer, and you can reason clearly and cogently as to why they don't exist, so you conclude that

So let's see if I have this right. * You've never met a 10x engineer, and you can reason clearly and cogently as to why they don't exist, so you conclude that they don't exist; * Someone ... indeed, several someones ... tell you they they have met, worked with, and/or managed people who really are 10x engineers; * You say that these people must be wrong. This feels a lot like the biologists who wrote - convincingly - that kangaroos can't exist. They'd never seen one, and gave completely water-tight arguments that the method of locomotion was inherently impossible.