I quite like the Haskell culture for this one: you specify the type signatures explicitly for your top-level functions, but you don’t usually specify them for n

I quite like the Haskell culture for this one: you specify the type signatures explicitly for your top-level functions, but you don’t usually specify them for nested functions. Put another way, anything with an interface you might need to understand somewhere else should be explicit, but anything only used very locally doesn’t need to be.