[fire_lake]

Isn’t this possible with any untyped language?

It does sound like a good feature though - very few languages have opt-out type checking. This is much better than opt-in IMO.

[7h3kk1d]

Hazel will also run incomplete programs around holes. Most untyped languages will just crash as soon as something is incomplete.

[instig007]

Laziness would be enough for this case, Haskell will happily run your programs around undefined

[conartist6]

Yes and no. You need a universal way of saying "something that should exist here is missing"