Put the happiness sensor on the surface of the human body or implanted into the human body, and the happiness index of people every moment can be measured through various indicators. No happiness sensor will be perfect, and there is no need. The thermometer was also very inaccurate when it was invented, but with the passage of time, the design of the thermometer has become increasingly refined, and it is now an indispensable commodity. Scientists believe that happiness Sensors will follow a similar evolutionary process. Although they will always have a certain degree of uncertainty in assessing people's psychological state, wearable sensors are more low-key and easier to use than traditional tools to measure happiness.
The passage is intended to emphasize that human beings do not need perfect happiness sensors.