“What have you learned that was beneficial to you?” This question may be a sterile one, since it is necessarily highly abstract and the questioner may not be able to accept it even if he or she answers it. In my opinion, the useful things were around “Relativization of correctness”, “the concept of prior after the fact”, “the concept of Unexpected X” (Unexpected Success), and “the meaning of a word relative to its meaning”.
Thinking back a bit, Dimensional Extension, Body Enlargement and random variable were also useful knowledge. When I was writing about body enlargement, I thought that “relativization” would be useful, since this is also “relativization of the concept of number”. And this use of the word “relativization” is itself a personal metaphor (relativization of the meaning of the word).
This page is auto-translated from /nishio/有益な知識 using DeepL. 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.