[lakecresva]

>You simply do not have that in a static world.

I keep seeing lisp people bandy about all of this design by contract/arbitrary predicate validation stuff. Can you give an example of an instance in which static types + runtime checks don't completely subsume this?

My intuition is that almost all of these methods people are talking about would have to be enforced at run-time, in which case I don't see how it's providing anything fundamentally more than writing an assertion or a conditional.