Now some time free to reply.
It just occurred to me that we rarely see people swimming in anime and manga, which makes me wonder whether the characters can even swim to begin with.
The question came to me while swimming ...
The cockade under the eagle is, for example, different. Also, the eagle looks left and not right from the point of the observer.
The reason we focus on negative feedback rather positive is that positive confirms, meanwhile negative counters our position. As such, positive requires no reaction, whereas negative one does.
Thx, Tsuru.

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