Ok, fair enough, then we just have different definitons of symbols, and there apparently is no hard definition. :D

> I'm not sure, this symbol is not known in Germany or at least has not been when I went to school there

Interesting, it was when I went to school! Maybe it's not as universal as the internet thinks it is. But the meaning surely was different, in my class it was used by the class clown as a personal symbol of approval :D