It's not all black or white. While most mappings are dictated by meaning, some are instead were chosen for their position, eg. hjkl, or relative position, eg. ?

It's not all black or white. While most mappings are dictated by meaning, some are instead were chosen for their position, eg. hjkl, or relative position, eg. ? is the reverse of / just because in the US layout they are on the same key.