The `mount` is overloading /mnt/foo, and in a similar manner also overloading /mnt/foo/.. that's why. If you examine an unmounted filesystem however, the raw /

The `mount` is overloading /mnt/foo, and in a similar manner also overloading /mnt/foo/.. that's why. If you examine an unmounted filesystem however, the raw /.. directory entry points to the same place as /. directory entry.