I find static types useful for gaining that understanding. It's very helpful to clear up confusion in my head to start prototyping by writing down type definiti

I find static types useful for gaining that understanding. It's very helpful to clear up confusion in my head to start prototyping by writing down type definitions and functions' type signatures without implementations before starting to write the actual code. Of course, this only works with a language where the type system is sufficiently painless and allows for such experimentation without a ton of boilerplate (i.e. the language is not Java).