In 2020, the AI revolution is so rapid, as a result, the changing speed of work in the world after 2020 is much faster than before the Covid situation. For example, Windows 11, provided by Microsoft, has "Copilot AI", which helps the users automatically. ChatGPT, the generative AI provided by OpenAI, generate many sentences and images, and is just now the centre of business, which is easy jobs. There is a possibility that so many people who can do the job that AI also can do lose their jobs. In the last decade, AI can do only a few tasks, for example, suggesting items from the purchasing history. However, AI can do so many things like a human today. I think people should study the structure of anything they are interested in. Getting knowledge is an easy thing, and everyone can do it, but the important thing is to connect knowledge to other ones. To achieve this, need to know about the structure, and you can consider how to connect knowledge to other knowledge. For example, the espo...