This is a normal phenomenon, and we often make such mistakes. Although we often say that there are 100 people in the world, one thing is certain. Many people should look the same, which is what we call the public face. What's more, there is another operation called plastic surgery. Many people will arrange their looks according to the same mold, so the chances of mistaking one for another will be greater. But there will always be differences between the same two people, at least their personalities and accents cannot be changed.