https://hoogle.haskell.org/?hoogle=%28%21%3D%29&scope=set%3Astackage https://hoogle.haskell.org/?hoogle=%28%21%3D%29&scope=set%3A... Using Haskell is one such

https://hoogle.haskell.org/?hoogle=%28%21%3D%29&scope=set%3Astackage https://hoogle.haskell.org/?hoogle=%28%21%3D%29&scope=set%3A... Using Haskell is one such situation. Haskell's inequality operator is /= which someone could expect when they see ≠. Some people redefine != as a custom operator (see link), which can bring even more confusion with this ligatures.