For some quantities, the zero level is naturally distinguished from all other levels, whereas for others it is more or less arbitrarily chosen.
Daɣ iddikud tan iyyǎd, edǎg wan bǎnnǎn izlay id ihǎndǎgǎn wi yǎdnen as ijja awen i wi yǎdnen amos nefraǎ n bǎnnǎn.