the fact that php calls the ( :: ) symbol T_PAAMAYIM_NEKUDOTAYIM and the dev's where too idiotic to change error messages about it for a long time so you could actually read what the hell a T_PAAMAYIM_NEKUDOTAYIM is.
(Apparently, its Hebrew for double colon and according to posts on the internet and even contains an spelling error. Because Hebrew alone in error messages wasn't bad enough, it had to contain errors.)