<p dir="ltr">Background: from 2017 to 2019, I had taken part in the research project with the funding support in NICT(Japan). That project is about autonomous driving. I investigated AI, and asked my friend(professional in AI) in NWPU(China). The conclusion is that "knowing is knowing; unknown is unknown". Finally, I was very lucky that I met the books [Mind, Self & Society] and the algebra.</p><p dir="ltr">My view: according to the proposal "Society 5.0" in Japan, I found that the word "communication" has many meanings. </p>
