Static typing is not only about declaring your arguments and variables as simple types (int, float, array of ints etc). It means having a distinct type for any

Static typing is not only about declaring your arguments and variables as simple types (int, float, array of ints etc). It means having a distinct type for any complex structure you pass around (think pre-normalization API params, post-normalization API params, slightly enriched post-processing data as separate type vs a dict of str to anything in Python), or anything you want to make compatible (think interfaces vs duck typing).