Over the past few decades, mankind has gained wide knowledge. We can predict hurricanes, build skyscrapers, and save people from serious diseases and critical injuries. Nevertheless, smart and experienced people are still making regular errors. Approximately from the number of fatal errors in the medical field, the ATUL GAAWANDE tried to know the possible causes and solutions to such a failure that can be avoided, so I discovered a simple and strong solution to correct things; It is the use of verification lists. Whether you are going to the supermarket to buy chocolate cake ingredients, or if you are preparing a plane to take off, or evaluate a sick person in the hospital, if you miss something one president you will not be able to perform your task correctly. We all need to verify lists.