useful
What is "useful?"
Choose from several options that you think would be "useful We know that the knowledge that produced the choice is useful when, after choosing and executing it, posterior we actually obtain a useful result. I thought it needed a little work because it was circular referencing, but I also felt that it would be good if it was useful even if it was circular referencing. relevance
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This page is auto-translated from /nishio/有用. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.