Why was the "I" created?

Since it contradicts against common knowledge, many people might respond with "What nonsense!"

Also, I think there may be comments such as "It's difficult to understand when reading." Any kind of feedback is welcome. I would be grateful for your comments.

I would like to respond as much as possible. Also, I hope to use this as a reference when issuing the revised version.

I would be grateful if you could click on the "Opinions and questions" below and send me your comments.