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I thought になる could also mean 決まる ( In addition to change of state) - Result in, be settled (without human agent being explicitly stated). For example 旅行の出発日は八月三十日になった。and 今度の冬のオリンピックはどこになりましたか。
@A.Ellett Well they all mean something happened by itself right? why what is the difference between them if they mean the same thing, something magically happened by itself?