You can do that in Haskell also. Just turn on the -fdefer-type-errors GHC option and leave out most of the type signatures. Any expression with a type error wil

You can do that in Haskell also. Just turn on the -fdefer-type-errors GHC option and leave out most of the type signatures. Any expression with a type error will be reported when/if the expression is evaluated at runtime. You'll probably still need a few type hints, to avoid ambiguity, but otherwise it's not that different from programming in a dynamically-typed language.