The real reason its bad is because its not really easier to be more productive doing this: > You write a Python function with a natural language specification

The real reason its bad is because its not really easier to be more productive doing this: > You write a Python function with a natural language specification instead of implementation code. You attach post-conditions – plain Python assertions that define what correct output looks like. Vs > You write a Python function with ~~a natural language specification instead of~~ implementation code. In many cases.