Double Spend Proofs: What they are and how they work. Introduction In my youth I read a the wonderful story about a car manufacturer that made a very fancy car which had superb traction and when you went through a corner you would not feel any vibration or other problems while steering it through even the most sharp corners. It was amazing. And it was deadly. When the car got tested by people that were not professional drivers, those people got confused with the total lack…