What is the function of human "fingerprints"?

Fingerprint is an ID card given to us by nature, and it is everyone's identification feature. Everyone's fingerprint is different. After the corresponding fingerprint payment fingerprint identification function appears on mobile phones, people realize that everyone's fingerprints are different, but the earliest humans also had different sizes, and they also had some other functions.

Fingerprint is a very important way to increase the friction of our fingers, which appeared after human beings evolved to a certain extent, because from the Darwinian evolutionary point of view, when human beings are monkeys, they have claws when they come to people. Having claws like cats can naturally increase their grip and will not affect their normal life, but after human beings evolved into fingers, there is no corresponding way to increase the friction, so another function that nature gives to human beings is fingerprints on the fingers, which are with us.

Fingerprint is everyone's identification feature, which may be arranged by nature, because in the eyes of nature, all animals may be equal, because in the eyes of nature, human beings are just a kind of advanced animals. They know that other animals have their own identification methods, and human beings naturally have human fingerprints. The lines on human tongue and human facial features are all identification methods, but human fingerprints are impossible to repeat. It is something similar to an ID card, and it is a way for people to recognize each other. Now fingerprint identification has become a main way of identity identification.

Our fingerprints are unique, which is the most obvious evidence that we have come to this world. The fingerprints recognized by our mobile phones are not really complete fingerprints, because the existing technology level is still limited, and it is impossible to distinguish the slightest difference in fingerprints in detail, so it is only a rough fingerprint difference now, but it is basically difficult to duplicate fingerprints.